巯基乙酸甲酯 、
2-Hydroxy-7-methoxy-5-methyl-naphthalene-1-carboxylic acid (E)-(11S,12S)-11-(4,5-dihydroxy-6-methyl-3-methylamino-tetrahydro-pyran-2-yloxy)-4-(2-oxo-[1,3]dioxolan-4-yl)-5-oxa-tricyclo[8.3.0.04,6]trideca-1(13),9-diene-2,7-diyn-12-yl ester 以
甲醇 为溶剂,
以30%的产率得到2-Hydroxy-7-methoxy-5-methyl-naphthalene-1-carboxylic acid (1S,2R)-1-(4,5-dihydroxy-6-methyl-3-methylamino-tetrahydro-pyran-2-yloxy)-5-hydroxy-3-methoxycarbonylmethylsulfanyl-5-(2-oxo-[1,3]dioxolan-4-yl)-1,2,3,5-tetrahydro-s-indacen-2-yl ester