Cc1cc2oc3c(c(=O)c2cc1C)C(c1ccc(C(C)C)cc1)N(c1nc(C)c(C)s1)C3=O
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?