CCOC(=O)c1nc2c3c(ncn2n1)Oc1c(c(-c2ccccc2)nn1-c1ccccc1)C3c1ccc(OC)c(OC)c1
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?