COc1ccc(N2C(=O)[C@H]3[C@@H](C2=O)[C@@H]2C=CC=NN2[C@H]3C(=O)c2ccc(OC(C)=O)cc2)cc1
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?