Panurensis

Norpanurensine (237), C36H38N206, from Abuta panurensis Eichler (Menispermaceae), crystallized as needles (MeOH), mp 175°C, [a]D —250° (c 0.1, CHC13), IR 3400 cm 1 (OH), 3200 (NH), HRMS mle 594.2712 N-Methylation with CH20/NaBH4 in CHCl3-MeOH gave material identical to panurensine... 

Triplaris surinamensis Chamisso-218,271 Triplaris surinamensis Chanusso var. cha-missoana Meissner—271 Turbina corymbosa (L.) Rafinesque—125-7, 140,152,159,161,295,351,437 Turbinicarpus pseudomacrochele (Backe-betg) Buxbaum et Backeberg-107 Tynrutntkus panurensis (Bur.) Sand,—269... 

S. panurensis Sprague et Sandw. is an erect shrub that later becomes scandent, forming a liane of modest dimensions. It ranges from Panama as far south as Peru (Junin) and Brazil (Acre) (108, 217). However, it is only known as a constituent of curare in the northwest Amazon and middle Orinoco regions. See also S. gubleri (Section 1.3.1.4). 

Be that as it may, Planchon named sterile material of a species apparently used as an ingredient in the curare made by the Makiritare and Piaroa of the middle Orinoco S, gubleri (S. gubleriana) (223,224,227,230). In the herbarium of the Faculte de Pharmacie, Paris, there is an unnumbered Gaillard collection with the name S. gubleri which is almost certainly a duplicate of the sheet Gaillard 16 kept in the herbarium of the Museum National d Histoire Na-turelle, Paris (P) their annotations are very similar. The latter sheet has been determined as S. panurensis (90,108) and it is likely that Planchon s S. gubleri should be identified with this species. 

While the stem wood of A. fluminum Krukoff et Bameby, A. pahni, A. rufescens (splendida), A. solimoesensis Krukoff et Bameby, and A. velutina Gleason is reported to be virtually free of alkaloids (411), the leaves of A. grisebachii and A. panurensis and the bark of A, velutina have furnished positive alkaloid tests (409). 

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