CCOc1cc(C(C(=O)NCC2CCCO2)N(C(=O)Cn2nnc3ccccc32)c2ccc(C(C)=O)cc2)ccc1O
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?