COC(=O)C(Cc1c[nH]c2ccccc12)NP(=O)(O)OCC1OC(n2ccc(N)nc2=O)C(O)C1O
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?