CC(C)C(=O)OCC1OC(n2c(Br)nc3c(=O)[nH]c(N)nc32)C(OC(=O)C(C)C)C1OC(=O)C(C)C
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?