Tabernaemontana orientalis

The importance of unequivocally identifying botanical material, and naming it correctly, complete with the authority, is well illustrated in a study of four distinct Ervatamia species, all of which have at some time been named E. orientalis, with consequent inevitable confusion.64 The leaves of E. orientalis (R. Brown) Domin (=Tabernaemontana orientalis R. Brown), from New Guinea, unlike the other... 

Miers. =Tabernaemontana affinis Muell. Arg.)/ dregamine and tabernaemon-tanine in the root bark of Tabemaemontana elegans Stapf./ in the leaves of T. coronaria R.Br./ and (together with vobasine) in the bark of Ervatamia orientalis (R.Br.) Turrell. ... 

The recent reports of the occurrences of these alkaloids are given in Table II. Pandoline (657) has been isolated from the leaves and stems of Melodinus polyadenus (Baill.) Boiteau 99, 373), from Ervatamia obtusius-cula Mgf. (373), and from the leaves of E. lifuana Boiteau 374), Tabemae-montana citrifolia L. 32), Stenosolen heterophyllus (Vahl) Mgf. 29, 375), and E. orientalis (R. Brown) Domin 374). 20-Epipandoline (658) occurs in the first four of these species, and pandine ( 9) in the last four, and also in the stems and leaves of Tabernaemontana pandacaqui Poir 376). 

Strictosidine (104) is produced by the plant Rhazya stricta. A crude enzyme preparation from the plant was used to produce labelled strictosidine this, when incubated with Catharanthus enzyme, again gave the three alkaloids (105), (106), and (107). ° Cell-free preparations of cell-suspension cultures of Amsonia tabernaemontana, Rhazya orientalis, and Vinca minor were also observed to convert (102) plus (103) into strictosidine (104) with fair efficiency the formation of vincoside (109) was never observed. ... 

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