CCOC(=O)c1nc2c3c(ncn2n1)Oc1c(c(-c2ccccc2)nn1-c1ccccc1)C3c1ccc(OC)c(OC)c1
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?