40098-44-0
乙基 5-氧代环戊-1-烯-1-庚酸酯
→
52419-10-0
ethyl 7-(3-acetyloxy-5-oxocyclopenten-1-yl)heptanoate
52419-09-7
N-(dimethylamino-methylene)-4-methyl-thiobenzamide