COc1cc2c(cc1OCCCC(=O)Nc1cc(C(=O)NCCCN(C)C)n(C)n1)N=CC1CCCN1C2=O
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?