177364-94-2
2H-Thieno[3,4-b][1,4]dioxepin-6,8-dicarboxylic acid, 3,4-dihydro-,diethyl ester
→
~97%
177364-98-6
3,4-亚丙基二氧噻吩-2,5-二羧酸
1822-66-8
3,4-二羟基噻吩-2,5-二羧酸二乙酯