GSK-0660 25MG. GSK-0660, CAS: 1014691-61-2, Molecular Formula: C19H18N2O5S2, Molecular Weight: 418. 49, Purity: greater than or equal to 98%, Appearance: Off-white solid, Synonym: 3-[[[2-Methoxy-4-(phenylamino)phenyl]amino]sulfonyl]-2-thiophenecarboxylic acid methyl ester, Size: 25MG