(R)-(-)-pantolactone 、 2,3-Dihydrospiro[1H-indene-1,4'-piperidine]-3,1'-dicarboxylic acid1'-(1,1-dimethylethyl)3-(1-[(ethoxy)-carbonyl]ethyl)Diester 、
螺[1H-茚-1,4-哌啶]-1,3-二羧酸, 2,3-二氢- 1,1-二甲基乙酯 生成
2,3-Dihydrospiro[1H-indene-1,4'-piperidine]3,1'-dicarboxylic acid 1'-(1,1-dimethylethyl)3-(2-oxo-4,4-dimethyltetrahydrofuran-3-yl) Diester