diff --git a/packages/ketcher-core/src/chemistry/entities/SGroup.ts b/packages/ketcher-core/src/chemistry/entities/SGroup.ts
index 3c28ac5d41..e0e477a655 100644
--- a/packages/ketcher-core/src/chemistry/entities/SGroup.ts
+++ b/packages/ketcher-core/src/chemistry/entities/SGroup.ts
@@ -245,14 +245,16 @@ export class SGroup {
 
   static getBracketParameters(
     mol,
-    xbonds,
+    crossBonds,
     atomSet: Pile<number>,
     bb,
     d,
     n
   ): Array<any> {
     var brackets: Array<any> = []
-    if (xbonds.length < 2) {
+    const crossBondsPerAtom = Object.values(crossBonds)
+    const crossBondsValues = Array.prototype.concat.apply([], crossBondsPerAtom)
+    if (crossBondsValues.length < 2) {
       ;(function () {
         d = d || new Vec2(1, 0)
         n = n || d.rotateSC(1, 0)
@@ -266,11 +268,11 @@ export class SGroup {
           new SGroupBracketParams(cr, d, bracketWidth, bracketHeight)
         )
       })()
-    } else if (xbonds.length === 2) {
+    } else if (crossBondsValues.length === 2) {
       ;(function () {
         // eslint-disable-line max-statements
-        var b1 = mol.bonds.get(xbonds[0])
-        var b2 = mol.bonds.get(xbonds[1])
+        var b1 = mol.bonds.get(crossBondsValues[0])
+        var b2 = mol.bonds.get(crossBondsValues[1])
         var cl0 = b1.getCenter(mol)
         var cr0 = b2.getCenter(mol)
         var dr = Vec2.diff(cr0, cl0).normalized()
@@ -295,8 +297,8 @@ export class SGroup {
       })()
     } else {
       ;(function () {
-        for (var i = 0; i < xbonds.length; ++i) {
-          var b = mol.bonds.get(xbonds[i])
+        for (var i = 0; i < crossBondsValues.length; ++i) {
+          var b = mol.bonds.get(crossBondsValues[i])
           var c = b.getCenter(mol)
           var d = atomSet.has(b.begin) ? b.getDir(mol) : b.getDir(mol).negated()
           brackets.push(new SGroupBracketParams(c, d, 0.2, 1.0))