3-hydroxy-5-methyl-3,7-dihydro-2H-furo[2,3-f]indol-6-one

5-甲基-3,6-二氧代-2,3,6,7-四氢-呋喃并[2,3-f]吲哚

(1-methyl-2-oxo-3H-indol-5-yl) 2-chloroacetate

5-羟基-1-甲基-2-吲哚啉酮

对甲氨基酚