COc1cc2c3cc1Oc1c(OC)c(OC)cc4c1C(Cc1cccc(c1)Oc1ccc(c(O)c1)CC3N(C)CC2)N(C)CC4.Cl.Cl
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?