CCN(CC)CCN1C(=O)C(O)=C(C(=O)c2c(C)[nH]c(C(=O)OC)c2C)C1c1ccccc1OC
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?