Oc1ccc2ccccc2c1NCn1nc(CCCCCCCCc2nn(CNc3c(O)ccc4ccccc34)c(=S)o2)oc1=S
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?