In order to clarify the mechanism of action for the antioxidative activity
of fluvastatin sodium (FLV, (+/-)sodium (3RS, 5RS, 6E)-7-[3-(4-fluorophenyl
)-1-(1-methylethyl)-1H-indol-2-yl]-3,5-dihydroxy-6-heptanoate) and its deri
vatives, reaction of the corresponding methyl ester of FLV with di-tert-but
yl diperoxyoxalate was examined, and the corresponding keto derivative was
isolated from the reaction mixture. On the basis of this result, it was con
cluded that the active site is the allylic carbon conjugated with the indol
e ring.