[N-]=[N+]=Nc1ccc2c(c1)Sc1ccccc1N2CCCCN1CCN(Cc2ccc(C(=O)c3ccc(CSCC(N)C(=O)O)cc3)cc2)CC1
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?