CCOC1=C2CN(S(=O)(=O)c3ccc(C)cc3)[C@H](c3cccc4ccccc34)C[C@H]2C(C#N)(C#N)C(C#N)(C#N)C1
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?