CCn1c(=O)c(CCC(=O)N2CCN(c3ccccn3)CC2)c(C)c2c(C)nn(-c3cccc(C)c3)c21
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?