CC(C)(C)OC(=O)N1O[C@H]2C[C@@H]1[C@@H]1[C@@H]2N=NN1C12C[C@H]3C[C@@H](C1)C[C@@H](C2)C3
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?