COc1cc2c3cc1Oc1c(OC)c(OC)cc4c1C(=NCC4)Cc1ccc(cc1)Oc1cc(ccc1O)C[C@H]3N(C)CC2
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?