1-Piperazinecarboxylic acid, 4-methyl-, 6-(7-chloro-1,8-naphthyridin-2-yl)-2,3,6,7-tetrahydro-7-oxo-5H-1,4-dithiino(2,3-c)pyrrol-5-yl ester, S-oxide 94342-73-1 RP 46166 RP-46166