呋喃 、
(1,2:5,6-Di-O-isopropyliden-α-D-allofuranose-3-O-yl)-phenylglyoxylat 生成 (1R,5S,6R)-6-Phenyl-2,7-dioxa-bicyclo[3.2.0]hept-3-ene-6-carboxylic acid (3aR,5R,6R,6aR)-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl ester 、 (1S,5R,6S)-6-Phenyl-2,7-dioxa-bicyclo[3.2.0]hept-3-ene-6-carboxylic acid (3aR,5R,6R,6aR)-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl ester