Nature 165, 928 (10 June 1950); doi:10.1038/165928a0

Revision of Structural Interpretations among Tetrahydrocarbazole Derivatives

S. G. P. PLANT, R. ROBINSON & M. TOMLINSON

Dyson Perrins Laboratory, University, Oxford. March 8.

IT has already been reported¹ that the action of acids on 9-acetyl-10 : 11-dihydroxyhexahydrocarbazole yields an oxindole instead of a pseudo-indoxyl derivative, and this was confirmed by the synthesis of the latter, found to be identical with the so-called '11-hydroxytetrahydrocarbazolenine'.

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