COC(=O)C1=COC(OC2OC(CO)C(O)C(O)C2O)C2C3CN4CCc5c([nH]c6ccccc56)C4(CC12)O3
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?