ClCCCCCc1c2nc(c(CCCCCCl)c3ccc([nH]3)c(CCCCCCl)c3nc(c(CCCCCCl)c4ccc1[nH]4)C=C3)C=C2
The donor in a hydrogen bond is usually a strongly electronegative atom such as N, O, or F that is covalently bonded to a hydrogen bond. How many hydrogen bond donors does the molecule have?