红霉素 2'-醋酸酯

1,3-二氢-3-(乙酰氧基)-7-氯-2H-吲哚-2-酮

(5-bromo-2-oxo-1,3-dihydroindol-3-yl) acetate

2-acetamido-4-hydroxybenzoic acid

1-acetyl-6-bromo-3H-indol-2-one