diff --git a/packages/Chem/package.json b/packages/Chem/package.json
index e15ee0b81c..905a13db1a 100644
--- a/packages/Chem/package.json
+++ b/packages/Chem/package.json
@@ -49,7 +49,7 @@
     "@types/pako": "^2.0.3",
     "@webgpu/types": "^0.1.40",
     "cash-dom": "^8.1.5",
-    "datagrok-api": "^1.27.2",
+    "datagrok-api": "../../js-api",
     "dayjs": "^1.11.13",
     "file-loader": "^6.2.0",
     "js-yaml": "^4.1.1",
diff --git a/packages/Chem/src/open-chem/ocl-sketcher.ts b/packages/Chem/src/open-chem/ocl-sketcher.ts
index 1865732caa..d890bbbc72 100644
--- a/packages/Chem/src/open-chem/ocl-sketcher.ts
+++ b/packages/Chem/src/open-chem/ocl-sketcher.ts
@@ -60,48 +60,49 @@ export class OpenChemLibSketcher extends grok.chem.SketcherBase {
   }
 
   get smiles() {
-    if (this.explicitMol?.notation === 'smiles')
+    if (this.explicitMol?.notation === DG.chem.Notation.Smiles)
       return this.explicitMol.value;
     return this._sketcher ? this._sketcher.getSmiles() : '';
   }
 
   set smiles(s) {
-    this.explicitMol = {notation: 'smiles', value: s};
+    this.explicitMol = {notation: DG.chem.Notation.Smiles, value: s};
     this.importing = true;
     this._sketcher?.setSmiles(s);
   }
 
   get molFile() {
-    if (this.explicitMol?.notation === 'molblock')
+    if (this.explicitMol?.notation === DG.chem.Notation.MolBlock)
       return this.explicitMol.value;
     return this._sketcher ? this._sketcher.getMolFile() : '';
   }
 
   set molFile(s) {
-    this.explicitMol = {notation: 'molblock', value: s};
+    this.explicitMol = {notation: DG.chem.Notation.MolBlock, value: s};
     this.importing = true;
     this._sketcher?.setMolFile(s);
   }
 
   get molV3000() {
-    if (this.explicitMol?.notation === 'molblockV3000')
+    if (this.explicitMol?.notation === DG.chem.Notation.V3KMolBlock)
       return this.explicitMol.value;
     return this._sketcher ? this._sketcher.getMolFileV3() : '';
   }
 
   set molV3000(s) {
-    this.explicitMol = {notation: 'molblockV3000', value: s};
+    this.explicitMol = {notation: DG.chem.Notation.V3KMolBlock, value: s};
     this.importing = true;
     this._sketcher?.setMolFile(s);
   }
 
   async getSmarts(): Promise<string> {
+    if (this.explicitMol?.notation === DG.chem.Notation.Smarts)
+      return this.explicitMol.value;
     return PackageFunctions.convertMolNotation(this.molFile, DG.chem.Notation.MolBlock, DG.chem.Notation.Smarts);
   }
 
   set smarts(s: string) {
-    //@ts-ignore
-    this.explicitMol = {notation: 'smarts', value: s};
+    this.explicitMol = {notation: DG.chem.Notation.Smarts, value: s};
     this.importing = true;
     this.convertAndSetSmarts(s);
   }
diff --git a/packages/KetcherSketcher/package.json b/packages/KetcherSketcher/package.json
index 65698a2975..37227f222b 100644
--- a/packages/KetcherSketcher/package.json
+++ b/packages/KetcherSketcher/package.json
@@ -15,7 +15,7 @@
   "dependencies": {
     "@datagrok-libraries/utils": "^4.6.5",
     "@types/react-dom": "^18.2.0",
-    "datagrok-api": "^1.27.0",
+    "datagrok-api": "../../js-api",
     "file-loader": "^6.2.0",
     "ketcher-core": "^3.12.0",
     "ketcher-react": "^3.12.0",
diff --git a/packages/KetcherSketcher/src/ketcher.tsx b/packages/KetcherSketcher/src/ketcher.tsx
index c245e252a2..7346acfb39 100644
--- a/packages/KetcherSketcher/src/ketcher.tsx
+++ b/packages/KetcherSketcher/src/ketcher.tsx
@@ -12,7 +12,7 @@ import 'ketcher-react/dist/index.css';
 import '../css/editor.css';
 import {KETCHER_MOLV2000, KETCHER_MOLV3000} from './constants';
 
-type NotationKey = 'smiles' | 'molblock' | 'molblockV3000' | 'smarts';
+type NotationKey = DG.chem.Notation.Smiles | DG.chem.Notation.MolBlock | DG.chem.Notation.V3KMolBlock | DG.chem.Notation.Smarts;
 
 export class KetcherSketcher extends grok.chem.SketcherBase {
   _smiles: string | null = null;
@@ -141,7 +141,7 @@ export class KetcherSketcher extends grok.chem.SketcherBase {
   }
 
   get smiles() {
-    if (this.explicitMol?.notation === 'smiles')
+    if (this.explicitMol?.notation === DG.chem.Notation.Smiles)
       return this.explicitMol.value;
     if (this._smiles !== null)
       return this._smiles;
@@ -162,11 +162,11 @@ export class KetcherSketcher extends grok.chem.SketcherBase {
     this._molV3000 = null;
     this._smarts = null;
     this.importedMoleculesCounter++;
-    this._setNotation('smiles', smiles);
+    this._setNotation(DG.chem.Notation.Smiles, smiles);
   }
 
   get molFile() {
-    if (this.explicitMol?.notation === 'molblock')
+    if (this.explicitMol?.notation === DG.chem.Notation.MolBlock)
       return this.explicitMol.value;
     if (this._molV2000 !== null)
       return this._molV2000;
@@ -185,11 +185,11 @@ export class KetcherSketcher extends grok.chem.SketcherBase {
     this._molV3000 = null;
     this._smarts = null;
     this.importedMoleculesCounter++;
-    this._setNotation('molblock', molfile);
+    this._setNotation(DG.chem.Notation.MolBlock, molfile);
   }
 
   get molV3000() {
-    if (this.explicitMol?.notation === 'molblockV3000')
+    if (this.explicitMol?.notation === DG.chem.Notation.V3KMolBlock)
       return this.explicitMol.value;
     if (this._molV3000 !== null)
       return this._molV3000;
@@ -208,7 +208,7 @@ export class KetcherSketcher extends grok.chem.SketcherBase {
     this._smiles = null;
     this._smarts = null;
     this.importedMoleculesCounter++;
-    this._setNotation('molblockV3000', molfile);
+    this._setNotation(DG.chem.Notation.V3KMolBlock, molfile);
   }
 
   async getSmarts(): Promise<string> {
@@ -223,7 +223,7 @@ export class KetcherSketcher extends grok.chem.SketcherBase {
     this._molV2000 = null;
     this._smiles = null;
     this.importedMoleculesCounter++;
-    this._setNotation('smarts', smarts);
+    this._setNotation(DG.chem.Notation.Smarts, smarts);
   }
 
   get isInitialized() {
@@ -265,7 +265,6 @@ export class KetcherSketcher extends grok.chem.SketcherBase {
   private _setNotation(notation: NotationKey, value: string): void {
     this.updatingMolecule = true;
     this.setKetcherMolecule(value);
-    //@ts-ignore
     this.explicitMol = {notation, value};
   }