(+-)-2-methyl-(4arH.8acH)-4a,5,8,8a-tetrahydro-naphthoquinone-(1.4)

5,8-di-tert-butoxy-5,8,9,10-tetrahydro-2-methyl-1,4-naphthoquinone

草酸二乙酯

乙酸乙酯

正丙酸乙酯