(+)-(S)-2-(1-methylpropyl)pyridine

(2R,3S,4R)-2-((2-methoxyethoxy)methoxy)-4-methylhexan-3-ol

(S)-(-)-N-1-phenylethyl-(S)-(+)-2-methylbutyramide

2-甲基丁酰氯

3-((S)-2-methylbutyryloxy)-costu-1(10),4(5)-dien-12,6α-olide