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(2007/10/03)2-methyl-2-propen-1-yl succinic anhydride
(R)-5-Methyl-3-((S)-1-phenyl-ethylcarbamoyl)-hexanoic acid methyl ester
(2R)-2-[(methoxycarbonyl)methyl]-4-methylpentanoic acid
dihydro-3-(RS)-(2-methylpropyl)-2,5-furandione
D,L-2-isobutyl-3-(methoxycarbonyl)-propanoic acid