重氮甲烷 、
Methyl (28-Hydroxy-23,28-dioxoolean-12-en-3β-yl 2',3',4'-tri-O-acetyl-β-D-glucopyranoside)uronate 以
甲醇 、
乙醚 为溶剂,
以29 mg的产率得到(2S,3S,4S,5R,6R)-3,4,5-Triacetoxy-6-((3S,4S,4aR,6aR,6bS,8aS,14bR)-4-formyl-8a-methoxycarbonyl-4,6a,6b,11,11,14b-hexamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,14,14a,14b-icosahydro-picen-3-yloxy)-tetrahydro-pyran-2-carboxylic acid methyl ester