COc1ccc(CCNC(=O)c2ccc(Cn3c(=O)c4ccccc4n(Cc4cc(C)ccc4C)c3=O)cc2)cc1OC
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?