CCCc1cc2c(n1Cc1ccc(OC)cc1)C(C)C1CN(C(=O)c3ccccc3)C(C)(C(=O)OC)C21
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?