CC1=CC2C3(C)C(C)(C(C)=CP3(=O)c3c(C(C)C)cc(C(C)C)cc3C(C)C)C1P2(=O)c1c(C(C)C)cc(C(C)C)cc1C(C)C
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?