C#CC1(O)C(COP(=O)(O)OCC2OC(n3ccc(NCCCCCCCCCCCCCCCCCC)nc3=O)C(O)C2O)OC(n2ccc(N)nc2=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?