diff --git a/packages/ketcher-core/src/application/render/renderers/sequence/NucleotideSequenceItemRenderer.ts b/packages/ketcher-core/src/application/render/renderers/sequence/NucleotideSequenceItemRenderer.ts
index e482d50ec5..c4e548fbaa 100644
--- a/packages/ketcher-core/src/application/render/renderers/sequence/NucleotideSequenceItemRenderer.ts
+++ b/packages/ketcher-core/src/application/render/renderers/sequence/NucleotideSequenceItemRenderer.ts
@@ -56,5 +56,20 @@ export class NucleotideSequenceItemRenderer extends BaseSequenceItemRenderer {
         .attr('cx', '10')
         .attr('cy', '-16');
     }
+
+    // show modification for not last Nucleoside
+    if (!node.phosphate) {
+      this.phosphateModificationCircleElement = this.rootElement
+        ?.append('circle')
+        .attr('r', '3px')
+        .attr(
+          'stroke',
+          this.isSequenceEditInRnaBuilderModeTurnedOn ? '#24545A' : '#585858',
+        )
+        .attr('stroke-width', '1px')
+        .attr('fill', 'none')
+        .attr('cx', '10')
+        .attr('cy', '-16');
+    }
   }
 }
diff --git a/packages/ketcher-core/src/domain/entities/Nucleoside.ts b/packages/ketcher-core/src/domain/entities/Nucleoside.ts
index bf7bc2a189..d2abf4e72d 100644
--- a/packages/ketcher-core/src/domain/entities/Nucleoside.ts
+++ b/packages/ketcher-core/src/domain/entities/Nucleoside.ts
@@ -2,6 +2,7 @@ import { RNABase } from 'domain/entities/RNABase';
 import { Sugar } from 'domain/entities/Sugar';
 import assert from 'assert';
 import {
+  getNextMonomerInChain,
   getRnaBaseFromSugar,
   isValidNucleoside,
   isValidNucleotide,
@@ -97,6 +98,10 @@ export class Nucleoside {
   }
 
   public get modified() {
-    return this.rnaBase.isModification || this.sugar.isModification;
+    const isNotLastNode = !!getNextMonomerInChain(this.sugar);
+
+    return (
+      this.rnaBase.isModification || this.sugar.isModification || isNotLastNode
+    );
   }
 }