diff --git a/packages/ketcher-core/src/domain/entities/BaseMonomer.ts b/packages/ketcher-core/src/domain/entities/BaseMonomer.ts
index 789f5205a2..0e5756cd29 100644
--- a/packages/ketcher-core/src/domain/entities/BaseMonomer.ts
+++ b/packages/ketcher-core/src/domain/entities/BaseMonomer.ts
@@ -145,8 +145,11 @@ export abstract class BaseMonomer extends DrawingEntity {
     return Boolean(this.firstFreeAttachmentPoint);
   }
 
-  public isAttachmentPointExistAndFree(attachmentPoint: AttachmentPointName){
-        return this.hasAttachmentPoint(attachmentPoint) && !this.isAttachmentPointUsed(attachmentPoint)
+  public isAttachmentPointExistAndFree(attachmentPoint: AttachmentPointName) {
+    return (
+      this.hasAttachmentPoint(attachmentPoint) &&
+      !this.isAttachmentPointUsed(attachmentPoint)
+    );
   }
 
   public setRenderer(renderer: BaseMonomerRenderer) {
diff --git a/packages/ketcher-core/src/domain/entities/DrawingEntitiesManager.ts b/packages/ketcher-core/src/domain/entities/DrawingEntitiesManager.ts
index b07adeeff0..15d8aa6056 100644
--- a/packages/ketcher-core/src/domain/entities/DrawingEntitiesManager.ts
+++ b/packages/ketcher-core/src/domain/entities/DrawingEntitiesManager.ts
@@ -351,8 +351,11 @@ export class DrawingEntitiesManager {
     monomer.turnOnAttachmentPointsVisibility();
     bond.firstMonomer.removePotentialBonds();
     monomer.removePotentialBonds();
-    const firstMonomerValidSourcePoint = bond.firstMonomer.getValidSourcePoint(monomer);
-    const secondMonomerValidTargetPoint = monomer.getValidTargetPoint(bond.firstMonomer);
+    const firstMonomerValidSourcePoint =
+      bond.firstMonomer.getValidSourcePoint(monomer);
+    const secondMonomerValidTargetPoint = monomer.getValidTargetPoint(
+      bond.firstMonomer,
+    );
     bond.firstMonomer.setPotentialBond(firstMonomerValidSourcePoint, bond);
     monomer.setPotentialBond(secondMonomerValidTargetPoint, bond);
     const connectFirstMonomerOperation = new MonomerHoverOperation(
diff --git a/packages/ketcher-core/src/domain/entities/Peptide.ts b/packages/ketcher-core/src/domain/entities/Peptide.ts
index 28b689169d..f9a5e88eef 100644
--- a/packages/ketcher-core/src/domain/entities/Peptide.ts
+++ b/packages/ketcher-core/src/domain/entities/Peptide.ts
@@ -1,29 +1,36 @@
 import { BaseMonomer } from './BaseMonomer';
 
 export class Peptide extends BaseMonomer {
-
   public getValidSourcePoint(monomer: BaseMonomer) {
-    
-        if (monomer.isAttachmentPointExistAndFree('R1') && this.isAttachmentPointExistAndFree('R2')) {
-          
-          return 'R2';
+    if (
+      monomer.isAttachmentPointExistAndFree('R1') &&
+      this.isAttachmentPointExistAndFree('R2')
+    ) {
+      return 'R2';
+    }
+    if (
+      this.isAttachmentPointExistAndFree('R1') &&
+      monomer.isAttachmentPointExistAndFree('R2')
+    ) {
+      return 'R1';
+    }
 
-        }
-        if (this.isAttachmentPointExistAndFree('R1') && monomer.isAttachmentPointExistAndFree('R2') ) {
-          return 'R1';
-        }
-    
     return this.firstFreeAttachmentPoint;
   }
 
   public getValidTargetPoint(monomer: BaseMonomer) {
-
-      if (this.isAttachmentPointExistAndFree('R1') && monomer.isAttachmentPointExistAndFree('R2') ) {
-        return 'R1';
-      }
-        if (monomer.isAttachmentPointExistAndFree('R1') && this.isAttachmentPointExistAndFree('R2')) {
-          return 'R2';
-        }
+    if (
+      this.isAttachmentPointExistAndFree('R1') &&
+      monomer.isAttachmentPointExistAndFree('R2')
+    ) {
+      return 'R1';
+    }
+    if (
+      monomer.isAttachmentPointExistAndFree('R1') &&
+      this.isAttachmentPointExistAndFree('R2')
+    ) {
+      return 'R2';
+    }
 
     return this.firstFreeAttachmentPoint;
   }