Cc1ccc(/C=C/C(=O)c2sc(-c3nc(C)c(C(=O)/C=C/c4ccc(C)cc4)s3)nc2C)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?