CCC12C=CCN3CCC4(c5cc(C6(C(=O)OC)CCCCCc7c6[nH]c6ccccc76)c(OC)cc5N(C)C4C(O)(C(=O)OC)C1OC(C)=O)C32
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?