I have a structure in the database: Cn1ccc(=O)n(c1=O)O When I`m searching via fastsearch index for this smiles: O=c1cc[nH]c(=O)n1O which is apparent substructure, there are no results (structures attached)
2.3.2 not 2.0_alpha
2.3.2 not 2.0_alpha