Vincamajoreine

In view of the similarity between their physical data, deacetyl-majoridine is believed to be identical with vincamajoreine (10) which was already considered to be an isomer of 10-methoxytetraphyllicine (11). 

The presence of vincamajine and vincamajoreine in the aerial parts of Vinca major has again been noted,and a new alkaloid, majorinine, has been isolated. Mainly on the basis of its spectroscopic properties, and particularly its 360 MHz n.m.r. spectra, majorinine is formulated as (146), Le. as 10-methoxyvomilenine (10-methoxy-21 -hydroxyvinorine). 

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