(2S,4S,5S,1'S)-4-carboxy-5-methyl-2-(1'-methylpropyl)heptanoic acid

(2R,4R,5S,1'S)-4-carboxy-5-methyl-2-(1'-methylpropyl)heptanoic acid

2,4-bis<(S)-1'-methylpropyl>pentan-5-olide