ethyl 3-(bromomethyl)-5-methylhexanoate

(4S)-ethyl tetrahydro-4-isobutyl-2-oxofuran-3-carboxylate

(4S)-4-Isobutyldihydro-2(3H)-furanone

(S)-(+)-3-(aminomethyl)-5-methylhexanoic acid (S)-mandelate

4-甲基-2-戊酮