α-Carboxy-β-carboxy-methyl-tropolon 、 alkaline earth salt of/the/ methylsulfuric acid 在
吡啶 、
乙酸酐 作用下,
生成
6-hydroxy-7-oxo-2-(3,4,5-trimethoxy-trans-styryl)-cyclohepta-1,3,5-trienecarboxylic acid 、 6-acetoxy-7-oxo-2-(3,4,5-trimethoxy-
trans-styryl)-cyclohepta-1,3,5-trienecarboxylic acid