CC(=O)O[C@H]1[C@@H](OC2CCCC2(c2ccccc2)c2ccccc2)O[N+]([O-])=C[C@@]12COCc1cc3c(cc12)OCO3
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?