CCCSc1ccc2[nH]c(N3C(=O)/C(=C/c4ccc(O)c(OC)c4)N=C3c3ccccc3)cc2c1
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?