COc1ccc(C(CC(=O)N2CCN(c3ccccc3)CC2)c2c(OC)cc(OC)c3c(-c4ccccc4)cc(=O)oc23)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?