COc1ccc(-c2c3c(=O)n(C)c(=O)n(C)c3c3n2-c2ccccc2NC3c2ccc(O)cc2O)cc1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?