C#C[C@]1(O)CC[C@H]2[C@@H]3CCC4=Cc5nc6nc7ccccc7n6cc5C[C@]4(C)[C@H]3CC[C@@]21C
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?