Cc1nn(CCC#N)c(NC(=O)c2ccc(Cl)cc2)c1P(=O)(Nc1ccc([N+](=O)[O-])cc1)N1CCOCC1
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?