Cc1noc(C)c1NC(=O)N(C)C[C@H]1Oc2ccc(NS(=O)(=O)c3c(C)noc3C)cc2C(=O)N([C@H](C)CO)C[C@@H]1C
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. This compound should contain a more electronegative atom (more electronegative than hydrogen) with lone electron pairs. Then it can attract protons from a donor. Moreover, the electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?