Pachycereus weberi

Heliamine, iV-methylheliamine, pellotine, and tehuanine have been isolated from the cactus Pachycereus weberi together with the novel alkaloids nortehuanine (4 R1 = R2 = OMe, R3 = H), lemaireocereine (4 R1 = R2 = H, R3 = OMe), weberine (4 R1 = R2 = R3 = OMe), and weberidine (4 R1 = R2 = R3 = H), the structures of which, with the exception of weberine, were confirmed by synthesis.12 Noroxy-hydrastinine and 6,7-dimethoxy-2-methylisoquinolone have been isolated from... 

The aromatic, tetramethoxy-substituted, tetrahydroisoquinoline alkaloid weberine has been isolated recently from extracts of the Mexican cactus Pachycereus weberi (38). The rare occurrence of four adjacent methoxy groups on an aryl moiety prompted the synthesis and examination by crystal-structure analyses of analogs and derivatives with four and five adjacent methoxy groups on the phenyl ring. In contrast to the problem with... 

Alkaloid from Pachycereus weberi (Cactaceae). Bpo 1 115° (synth.). ... 

Pachycereus weberi (Coult.) Backeb. Anhalonidine, heliamine, lemaireocereine, N-methylheliamine, northehaunine, peUotine, tehaunine, weberidine, weberine... 

The tallest Mexican columnar cactus Pachycereus weberi contains a great variety of differently substituted tetrahydroisoquinoHnes, mono-, di-, tri- and tetraoxyge-nated in the aromatic nucleus. Apparently this cactus has a highly evolved enzyme system for ring oxidation and 0-methylation (Mata and McLaughlin 1982). 

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