CC(=O)c1sc(-c2nc(C)c(C(=O)/C=C\c3ccc(/C=C\C(=O)c4sc(-c5nc(C)c(C(C)=O)s5)nc4C)cc3)s2)nc1C
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?