[A new alkaloid from Opuntia vulgaris].

OBJECTIVE

To study the chemical constituents of the stems of Opuntia vulgaris Mill(Cactaceae).

METHODS

The compounds of Opuntia vulgaris were isolated by chromatography of Amberlite Dowex 50 and silica gel, and identified by means of UV, IR, MS, 1D and 2D NMR.

RESULTS

Three compounds were isolated and identified as: opuntin B(I), 4-hydroxyproline(II) and tyrosine(III).

CONCLUSIONS

Compound I is a new alkaloid.