COc1ccc(NC(=O)c2sc3nc4c(c(-c5ccc(OC)cc5)c3c2N)C(=O)CC(C)(C)C4)cc1
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?