COc1ccc(OC2C=CC(c3ccccc3)OC2COC(=O)CCC(C)=NOC(C)c2cn(C(CO)Cc3ccccc3)nn2)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?