Cc1c(C#N)c(=O)[nH]c(=O)n1CCN1CCN(C(=O)NCCCCCCNC(=O)N2CCN(CCn3c(C)c(C#N)c(=O)[nH]c3=O)CC2)CC1
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?