diff --git a/ord_interface/editor/db/680b0d9fe649417cb092d790907bd5a5/full.pbtxt b/ord_interface/editor/db/680b0d9fe649417cb092d790907bd5a5/full.pbtxt
index 0ede50e0..e4e3ae28 100644
--- a/ord_interface/editor/db/680b0d9fe649417cb092d790907bd5a5/full.pbtxt
+++ b/ord_interface/editor/db/680b0d9fe649417cb092d790907bd5a5/full.pbtxt
@@ -95,6 +95,19 @@ reactions {
   inputs {
     key: "5"
     value {
+      components {
+        identifiers {
+          type: SMILES
+          details: "6"
+          value: "5"
+        }
+        amount {
+          unmeasured {
+            type: SATURATED
+            details: "saturated"
+          }
+        }
+      }
       addition_order: 93
       addition_time {
         value: 96.0
@@ -392,6 +405,14 @@ reactions {
     target_ph: 89.0
     is_automated: true
   }
+  workups {
+    amount {
+      unmeasured {
+        type: CATALYTIC
+        details: "catalytic"
+      }
+    }
+  }
   outcomes {
     reaction_time {
       value: 113.0
diff --git a/ord_interface/editor/html/reaction.html b/ord_interface/editor/html/reaction.html
index 639020e0..ec382c7d 100644
--- a/ord_interface/editor/html/reaction.html
+++ b/ord_interface/editor/html/reaction.html
@@ -220,7 +220,8 @@
                 <table class="component_role_limiting">
                   <tr><td>reaction role</td><td><div class="component_reaction_role selector" data-proto="ReactionRole_ReactionRoleType"></div></td></tr>
                   <tr class="limiting_reactant"><td>limiting reactant</td><td><div class="component_limiting optional_bool"></div></td></tr>
-                  <tr class="amount">
+                  <tbody class="amount">
+                  <tr>
                     <td>amount</td>
                     <td>
                       <div class="amount_value edittext shorttext floattext"></div>
@@ -230,6 +231,12 @@
                     <td class="amount_includes_solutes_label">includes solutes</td>
                     <td><div class="amount_includes_solutes optional_bool"></div></td>
                   </tr>
+                  <tr class="unmeasured_amount">
+                    <td>unmeasured?</td>
+                    <td><div class="unmeasured_amount_type selector" data-proto="UnmeasuredAmount_UnmeasuredAmountType"></div></td>
+                    <td>details</td><td><div class="unmeasured_amount_details edittext"></div></td>
+                  </tr>
+                  </tbody>
                 </table>
                 <fieldset class="s5">
                   <legend>
@@ -340,7 +347,8 @@
                   <tr><td>reaction ID</td><td><div class="crude_reaction edittext"></div></td></tr>
                   <tr><td>includes workup</td><td><div class="crude_includes_workup optional_bool"></div></td></tr>
                   <tr><td>has derived amount</td><td><div class="crude_has_derived optional_bool"></div></td></tr>
-                  <tr class="amount">
+                  <tbody class="amount">
+                  <tr>
                     <td>amount</td>
                     <td>
                       <div class="amount_value edittext shorttext floattext"></div>
@@ -348,6 +356,12 @@
                       <select class="amount_units mass volume"></select>
                     </td>
                   </tr>
+                  <tr class="unmeasured_amount">
+                    <td>unmeasured?</td>
+                    <td><div class="unmeasured_amount_type selector" data-proto="UnmeasuredAmount_UnmeasuredAmountType"></div></td>
+                    <td>details</td><td><div class="unmeasured_amount_details edittext"></div></td>
+                  </tr>
+                  </tbody>
                 </table>
               </fieldset>
             </div>
@@ -723,14 +737,21 @@
                                                      </td></tr>
               <tr><td>automated</td><td><div class="workup_automated optional_bool"></div></td></tr>
               <tr><td>details</td><td><div class="workup_details edittext paratext"></div></td></tr>
-              <tr class="workup_amount">
+              <tbody class="workup_amount amount">
+              <tr>
                 <td>aliquot amount</td>
-                <td class="amount">
+                <td>
                   <div class="amount_value edittext shorttext floattext"></div>
                   ± <div class="amount_precision edittext shorttext floattext"></div>
                   <select class="amount_units mass volume"></select>
                 </td>
               </tr>
+              <tr class="unmeasured_amount">
+                <td>unmeasured?</td>
+                <td><div class="unmeasured_amount_type selector" data-proto="UnmeasuredAmount_UnmeasuredAmountType"></div></td>
+                <td>details</td><td><div class="unmeasured_amount_details edittext"></div></td>
+              </tr>
+              </tbody>
             </table>
             <div class="workup_input">
               <!-- Shares ".input_template" with "#inputs" above. -->
@@ -886,6 +907,11 @@
                       <select class="amount_units mass" style="display: none;"></select>
                     </td>
                   </tr>
+                  <tr class="unmeasured_amount">
+                    <td>unmeasured?</td>
+                    <td><div class="unmeasured_amount_type selector" data-proto="UnmeasuredAmount_UnmeasuredAmountType"></div></td>
+                    <td>details</td><td><div class="unmeasured_amount_details edittext"></div></td>
+                  </tr>
                   <tr>
                     <td></td>
                     <td>
diff --git a/ord_interface/editor/js/amounts.js b/ord_interface/editor/js/amounts.js
index 84d74722..5afdad54 100644
--- a/ord_interface/editor/js/amounts.js
+++ b/ord_interface/editor/js/amounts.js
@@ -22,6 +22,7 @@ exports = {
   unload,
 };
 
+const asserts = goog.require('goog.asserts');
 const utils = goog.require('ord.utils');
 
 const Amount = goog.require('proto.ord.Amount');
@@ -31,6 +32,9 @@ const Moles = goog.require('proto.ord.Moles');
 const MolesUnit = goog.require('proto.ord.Moles.MolesUnit');
 const Volume = goog.require('proto.ord.Volume');
 const VolumeUnit = goog.require('proto.ord.Volume.VolumeUnit');
+const UnmeasuredAmount = goog.require('proto.ord.UnmeasuredAmount');
+const UnmeasuredAmountType =
+    goog.require('proto.ord.UnmeasuredAmount.UnmeasuredAmountType');
 
 /**
  * Initializes the selector for an Amount section.
@@ -149,6 +153,10 @@ function load(node, amount) {
                         : null;
     utils.setOptionalBool($('.amount_includes_solutes.optional_bool', node),
                           solutes);
+  } else if (amount.hasUnmeasured()) {
+    const unmeasured = amount.getUnmeasured();
+    utils.setSelector($('.unmeasured_amount_type', node), unmeasured.getType());
+    $('.unmeasured_amount_details', node).text(unmeasured.getDetails());
   }
 }
 
@@ -161,10 +169,13 @@ function unload(node) {
   const amount = new Amount();
   // NOTE(kearnes): Take the closest amount section; there may be others
   // nested deeper (e.g. in ProductMeasurement fields under a ReactionProduct).
-  node = $('.amount', node).first();
+  if (!$(node).hasClass("amount")) {
+    node = $('.amount', node).first();
+  }
   const value = parseFloat($('.amount_value', node).text());
   const precision = parseFloat($('.amount_precision', node).text());
   const units = $('.amount_units', node).val();
+  const unmeasuredDetails = $('.unmeasured_amount_details', node).text();
   if (MassUnit[units]) {
     const message = new Mass();
     if (!isNaN(value)) {
@@ -206,6 +217,15 @@ function unload(node) {
     if (solutes !== null) {
       amount.setVolumeIncludesSolutes(solutes);
     }
+  } else if (unmeasuredDetails) {
+    const unmeasured = new UnmeasuredAmount();
+    const unmeasuredType =
+        utils.getSelectorText($('.unmeasured_amount_type', node)[0]);
+    unmeasured.setType(UnmeasuredAmountType[unmeasuredType]);
+    unmeasured.setDetails(asserts.assertString(unmeasuredDetails));
+    if (!utils.isEmptyMessage(unmeasured)) {
+      amount.setUnmeasured(unmeasured);
+    }
   }
   return amount;
 }
diff --git a/ord_interface/editor/js/utils.js b/ord_interface/editor/js/utils.js
index ffff6131..dcfde36c 100644
--- a/ord_interface/editor/js/utils.js
+++ b/ord_interface/editor/js/utils.js
@@ -561,6 +561,7 @@ async function compareDataset(fileName, dataset) {
       if (xhr.status === 200) {
         resolve();
       } else {
+        console.log(xhr.response);
         reject();
       }
     };
diff --git a/ord_interface/editor/py/serve.py b/ord_interface/editor/py/serve.py
index d5a2050c..a7284d76 100644
--- a/ord_interface/editor/py/serve.py
+++ b/ord_interface/editor/py/serve.py
@@ -533,8 +533,8 @@ def compare(name):
     local_ascii = text_format.MessageToString(local)
     if remote_ascii != local_ascii:
         diff = difflib.context_diff(local_ascii.splitlines(), remote_ascii.splitlines(), n=10)
-        print(f"Datasets differ:\n{pprint.pformat(list(diff))}")
-        return "differs", 409  # "Conflict"
+        diff_text = pprint.pformat(list(diff))
+        return diff_text, 409  # "Conflict"
     return "equals"