This paper deals with the description of general, macroscopic and microscopic anatomy of Colletia paradoxa (Spreng.) Escalante, an aphyllous and xerophilous shrub from Rio Grande do Sul (Brazil). Pores of very small diameter, very short vessel elements, spiral thickenings and simple perforation plates in vessels, non sptate libriform fibers, scanty paratracheal axial paranchyma, and Heterogeneous II rays were observed in the wood.. Perforated cells are also common in rays. The presence of perforated ray cells and anatomical features of the vessel elements are discussed with respect to eco-physiological aspect of the plant and wood anatomy literature.

AbstractAus den Trimethylammonium‐Verbindungen (I) erhält man mit den Säureanhydriden (II) über diskutierte Zwischenstufen unter zweifacher Demethylierung die N‐Methyl‐amide (III).

From the bark of Aeschrion crenata Vell. (sin. Picrasma crenata (Vell.) Engl., Simaroubaceae) three new quassinoids, paraine (II), isoparaine (III), and 12-norquassine (IV), have been isolated. The last two compounds are already known as transformation products of other quassinoids.

From the trunk bark of Strychnos brasiliensis (Spreng.) Mart., spermostrychnine (I) and six new indoline alkaloids have been isolated and their structures and configurations determined. They were named: 12-hydroxy-11-methoxyspermostrychnine (II), strychnobrasiline (III), 12-hydroxy-11-methoxystrychnobrasiline (IV), 10,11-dimethoxystrychnobrasiline (V), strychnosilidine (VI), and strychnosiline (VII).

This datasheet on Strychnos brasiliensis covers Identity.

From the bark of Aeschrion crenata Vell. (sin. Picrasma crenata (Vell.) Engl.) 1-carbomethoxy-β-carboline (I) and two new β-carboline bases, named crenatine (II) and crenatidine (III), have been isolated. The structures of II and III are 1-ethyl-4-methoxy-β-carboline and 1-ethyl-4,8-dimethoxy-β-carboline, respectively.

AbstractAus der Rinde von Aeschrion crenata Vell.(sin.Picrasma crenata (Vell.) Engl.) wurden neben 1‐Carbomethoxy‐β‐carbolin (Ia) die beiden neuen β‐Carbolin‐ Alkaloide (Ib) und (Ic) isoliert und identifiziert.

From the bark of Aeschrion crenata Vell. (sin. Picrasma crenata (Vell.) Engl.) 1-carbomethoxy-β-carboline (I) and two new β-carboline bases, named crenatine (II) and crenatidine (III), have been isolated. The structures of II and III are 1-ethyl-4-methoxy-β-carboline and 1-ethyl-4,8-dimethoxy-β-carboline, respectively.

From the trunk bark of Strychnos brasiliensis (Spreng.) Mart., spermostrychnine (I) and six new indoline alkaloids have been isolated and their structures and configurations determined. They were named: 12-hydroxy-11-methoxyspermostrychnine (II), strychnobrasiline (III), 12-hydroxy-11-methoxystrychnobrasiline (IV), 10,11-dimethoxystrychnobrasiline (V), strychnosilidine (VI), and strychnosiline (VII).

From the bark of Helietta longifoliata Britt. (Rutaceae), the pentacyclic triterpenoid alcohol isobauerenol (D:C-friedo-ursa-8-en-3β-ol) (I) has been isolated for the first time from a natural source, and the following new derivatives described: isobauerenone (III) and isobauerene (IV).

A new terpenic furocoumarine was isolated from the bark of Helietta longifoliata Britt. It was named heliettin, and its structure established as (±)-3-(1,1-dimethylallyl)-6,7-dihydro-7-(1-hydroxy-1-methylethyl)-2H-furo-[2,3-gl-1-benzopyran-2-one (I), by spectral studies and chemical evidence.

From the aerial parts of Colletia spinosissima Gmel. (Rhamnaceae), two quaternary benzyltetrahydroisoquinoline alkaloids have been isolated. One, was identified as d-(−)-magnocurarine (I), and the structure of the other, which was named colletine, established as d-(−)-1-(4-methoxybenzyl)-2,2-dimethyl-6-methoxy-7-hydroxy-1,2,3,4-tetrahydroisoquinoline (II).

The relationship between the optical rotatory dispersion and absolute configuration of quaternary 1-benzyltetra-hydroisoquinolines and aporphines has been shown to be the same as that for the tertiary bases.