Mauri Lounasmaa

A 400 mhz 1H NMR study of the eight basic heteroyohimbine alkaloids

Abstract A 400 MHz 1 H NMR study of the eight basic heteroyohimbine alkaloids has permitted the chemical shifts of all the protons to be established and most of the main coupling constants to be determined. A conformational study of the heteroyohimbine structures is presented.

Benzyl-2 tropanes et γ-pyranotropanes, alcaloïdes de Knightia strobilina

Twelve new tropane alkaloids have been isolated from the leaves of the endemic New Caledonian plant Knightia strobilina Labill. (Proteaceae). The structure of seven of them, elucidated by spectroscopic methods, are described here.

Determination de structures par RMN du 1H A 400 MH : Alcaloides de tabernaemontana albiflora.

Abstract The structures of two new alkaloids of the 21-nor (+) pandolane type from the bark of Tabernaemontana albiflora (Miq.) Pull. (Apocynaceae), were determined.

Determination de structures par RMN du 1H A 400 MHz: Quatre nouveaux alcaloides de Tabernaemontana albiflora

Resume The structures of four new alkaloids 1 – 4 of the 21-nor (+) pandolane type from the stem bark of Tabernaemontana albiflora (Miq.) Pull. (Apocynaceae) have been determined.

Benzyl-2 pseudotropanes et dihydro γ-pyranotropanes, alcaloïdes de Knightia strobilina

Abstract The structures of five new tropane alkaloids, isolated from the leaves of the endemic New Caledonian plant Knightia strobilina have been elucidated by spectroscopic methods.

Structure determination using 1H nuclear magnetic resonance at 400 mhz: four new alkaloids from Tabernaemontana albiflora.

Resume The structures of four new alkaloids 1 – 4 of the 21-nor (+) pandolane type from the stem bark of Tabernaemontana albiflora (Miq.) Pull. (Apocynaceae) have been determined.

Structural determination by NMR of 1H at 400 MHz: alkaloids of Tabernaemontana albiflora.

Abstract The structures of two new alkaloids of the 21-nor (+) pandolane type from the bark of Tabernaemontana albiflora (Miq.) Pull. (Apocynaceae), were determined.