Although the S (+)-enantiomer of ibuprofen is the eutomer with respect to inhibition of prostaglandin formation, the marketed products containing ibuprofen are almost all supplied as the racemate. 虽然许多体内外试验结果都表明,S(+)-布洛芬作为优对映体在抑制前列腺素生成上优于R(-)-布洛芬,然而,市售的产品中仍多数为消旋体形式。