4-靛红4-bromoisatin cas:20780-72-7 5-靛红5-bromoisatin, cas:87-48-9 6-靛红6-bromoisatin, cas:6326-79-0 5-茚酮5-bromo-1-indanone cas:34598-49-7 5-靛红, :5-fluoroisatin cas:443-69-6 5-靛红酸酐 5-fluoroisatotc cnhydride cas：321-69-7 6-靛红酸酐 6-fluoroisatotc cnhydride cas：78755-94-9 5-靛红酸酐5-bromoisatoic anhydride, cas: 77603-45-3 (4692-98-2) 6-靛红酸酐6-bromoisatoic anhydride cas: 77603-45-3