I've been surprised by some of the results obtained when using this component - see attached example where indole-2-carboxylic acid is used as a query attempting to find the maximium common substructure with each of the other molecules shown - the atoms highlighted in pink are those returned as the MCS. There are so many issues - the acid is not matched in benzimidazole-2-carboxylic acid, whilst it is matched in the quinoxaline-2-carboxylic acid, but the 6-position carbon atom in the ring is not matched. Can someone else please confirm this erroneous behavior and if so can we please have a fix?