CCC1(CC)C(=O)C2=C3C1[C@H](C(=O)OC)CC(C(=O)OC)C[C@H]3[C@H]1C(=O)N(C)C(=O)[C@H]1[C@H]2C
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?