additional parts of the issue 256 fix
additional parts of the issue 256 fix

jandom/rdkit,rdkit/rdkit,strets123/rdkit,soerendip42/rdkit,bp-kelley/rdkit,strets123/rdkit,AlexanderSavelyev/rdkit,bp-kelley/rdkit,bp-kelley/rdkit,adalke/rdkit,soerendip42/rdkit,jandom/rdkit,jandom/rdkit,adalke/rdkit,strets123/rdkit,adalke/rdkit,rvianello/rdkit,soerendip42/rdkit,bp-kelley/rdkit,ptosco/rdkit,jandom/rdkit,rdkit/rdkit,jandom/rdkit,ptosco/rdkit,adalke/rdkit,strets123/rdkit,AlexanderSavelyev/rdkit,AlexanderSavelyev/rdkit,ptosco/rdkit,ptosco/rdkit,bp-kelley/rdkit,rdkit/rdkit,greglandrum/rdkit,rdkit/rdkit,strets123/rdkit,soerendip42/rdkit,ptosco/rdkit,bp-kelley/rdkit,adalke/rdkit,greglandrum/rdkit,greglandrum/rdkit,greglandrum/rdkit,rvianello/rdkit,jandom/rdkit,AlexanderSavelyev/rdkit,rdkit/rdkit,greglandrum/rdkit,strets123/rdkit,rvianello/rdkit,adalke/rdkit,soerendip42/rdkit,AlexanderSavelyev/rdkit,rvianello/rdkit,bp-kelley/rdkit,rvianello/rdkit,jandom/rdkit,soerendip42/rdkit,AlexanderSavelyev/rdkit,adalke/rdkit,greglandrum/rdkit,rdkit/rdkit,greglandrum/rdkit,ptosco/rdkit,greglandrum/rdkit,rvianello/rdkit,AlexanderSavelyev/rdkit,rvianello/rdkit,ptosco/rdkit,strets123/rdkit,soerendip42/rdkit,AlexanderSavelyev/rdkit,ptosco/rdkit,bp-kelley/rdkit,rdkit/rdkit,jandom/rdkit,adalke/rdkit,rvianello/rdkit,rdkit/rdkit,soerendip42/rdkit,AlexanderSavelyev/rdkit,strets123/rdkit