重氮甲烷 、
Jalarsaeure 生成 (3R,3aR,4S,7R,8S,8aS)-4-Hydroxy-8-hydroxymethyl-3,8-dimethyl-2,3,4,7,8,8a-hexahydro-1H-3a,7-methano-azulene-6-carboxylic acid methyl ester 、 (3S,3aR,4S,7R,8S,8aS)-4-Hydroxy-8-hydroxymethyl-3,8-dimethyl-2,3,4,7,8,8a-hexahydro-1H-3a,7-methano-azulene-6-carboxylic acid methyl ester