1,2,3,4-Tetrahydrocyclopent(b)indol-3-one 1-Keto-2,3-dihydrocyclopentindole 16244-15-8 5-21-08-00471 (Beilstein Handbook Reference) BRN 0147237 Cyclopent(b)indol-3-one, 1,2,3,4-tetrahydro- NSC 127326