3-(2-羧基乙基)-1H-吲哚-2-羧酸

(9ci)-2-氯-1-环戊烯-1-羰酰氯

6-甲基-7-(2-氧代丙氧基)-2,3-二氢环戊烯并[c]苯并吡喃-4(1H)-酮

2-methylsulfanyl-1,5,6,7-tetrahydrocyclopenta[d]pyrimidin-4-one

(2-methylsulfanyl-cyclopent-1-enecarbonyl)-urea