Carica papaya Carpaine

Calystegia sepium (calystegines), 357 Carica papaya (azimic acid), 164 Carica papaya (azimine), 164 Carica papaya (carpaine), 164 Carica papaya (carpamic acid), 164 Cassia species (cassine), 163,164, 174 Cassia species (iso-6-cassine), 163,164, 174... 

Many dimeric piperidine alkaloids also occur in nature, e.g., carpaine which has been isolated from papaya leaves (Carica papaya) 175 the absolute configuration has been determined.176 Naturally occurring isoquinoline alkaloids177 exist in dimeric forms in some cases, e.g., the bisbenzylisoquinoline alkaloids which have two benzylisoquinoline nuclei joined together through one, two, or even three ether bridges an example is epistephanine isolated from Stephania japonica.178... 

The papaya plant Carica papaya is a source of the known alkaloid (+)-carpaine (52, R=H) and also of the dehydro-carpaines-I (63) and -II (54) (C.-S. Tang, Phytochem.,... 

Evidence has been presented to the effect that pseudocarpaine, the minor alkaloid of Carica papaya, differs from carpaine (CXII) only in the stereochemistry of one of the methyl groups (iT S). 

Two new alkaloids of the carpaine group, dehydrocarpaine-I and -II, have been isolated from papaya leaves (Carica papaya L.). They have been formulated as (33) and (34) respectively, on spectral evidence and on the basis of their easy hydrogenation to carpaine. ... 

Papaya. Papaw, Carica melon tree. Fruit of Gj-rica papaya L., Caricaceae. Habit. Tropical America and Asia. Florida. Constit. Papain, the dried and purified latex of the fruit carpaine carpoeide (a glucoside). 

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