O=Cc1nc2c(=O)nc[nH]c2[nH]c1=O mol10041 0_1 O=Cc1nc2c(=O)nc[n-]c2[nH]c1=O mol10041 -1_1 O=Cc1nc2c(=O)nc[nH]c2[n-]c1=O mol10041 -1_2 O=Cc1nc2c(=O)nc[n-]c2[n-]c1=O mol10041 -2_1