Cc1cc2c3c(c1)C1(C(=O)N3C(C)(C)CC2C)C(C#N)=C(N)Oc2[nH]nc(C)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?