COc1cccc(C(C(=O)NC(C)(C)C)N(C(=O)CCC(=O)Nc2cc(C)on2)c2ccc3c(c2)OCCO3)c1OC
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?