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Report | Regular issue | Vol 9, No. 9, 1978, pp.1287-1294
Published online, 1st January, 1970
DOI: 10.3987/R-1978-09-1287
Studies in Protoberberibe Alkaloids. XVI. NMR Spectral Studies of 10,11-Dioxygenated 13-Methyltetrahydroprotoberberines

Bantwal R. Pai,* Kuppuswamy Nagarajan, Hosbett Suguna, and Sankaran Natarajan

*Department of Chemistry, Presidency College, Madras 600005, India

Abstract

The NNR chemical shift differences of protons at C13a and C8 and the methyl protons at C13 of cis- and trans-fused 10,11-dioxygenated 13-methyltetrahydroprotoberberines are discussed.