KelfizinKelfizine WPolycidalSulfamethoxypyrazineSulfapyrazinemethoxyneVetkelfizinaSulfamethoxypyrazine2-Methoxy-3-sulfanilamidopyrazine3-Methoxy-2-sulfapyrazine3-Methoxypyrazine SulfanilamideSMP2SulfaleneSulfamethopyrazineSulfametopyrazineSulfapyrazinemethoxineSulfapyrazinemethoxyineN1-(3-Methoxy-2-pyrazinyl)sulfanilamide4-Amino-N-(3-methoxypyrazinyl)-benzenesulfonamideDalysepKelfizinaLongumNSC 1104332-Sulfanilamido-3-methoxypyrazine3-Methoxy-2-sulfanilamidopyrazineF.I. 5978Farmitalia 204/122PolicydalAS 18908N1-(3-Methoxypyrazinyl)-sulfanilamide