CCC(=O)O[C@H]1CC[C@H]2[C@@H]3CCC4=C/C(=N/OC(=O)c5cccc6cc7ccccc7nc56)CC[C@]4(C)[C@H]3CC[C@]12C
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?