(3S,8aS)-6,7,8,8a-Tetrahydro-3-isopropyl-1-methoxy-8a-methylpyrrolo(1,2-a)pyrazin-4(3H)-one

(3S,9aR)-3-isopropyl-1-methoxy-9a-methyl-7,8,9,9a-tetrahydro-3H-pyrido[1,2-a]pyrazin-4(6H)-one

(3S,6S)-3-isopropyl-6-neopentylpiperazine-2,5-dione

(S)-(+)-2-氨基-3-羟基-3-甲基丁酸

(3R,6S,1'S)-3-(1-Hydroxyethyl)-6-isopropyl-2,5-dimethoxy-3,6-dihydropyrazine