COC(=O)Cc1c[nH]c2cccc(OCC(O)CN(Cc3ccccc3)C(C)C)c12.O=C(O)c1ccccc1O
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?