lycopsamine
National Institutes of Health
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Toxicity of pyrrolizidine alkaloids (PAs) largely depends on their metabolic activation by hepatic enzymes, including cytochrome…
INTRODUCTION
A previous investigation of pyrrolizidine alkaloids produced by nine species of Cryptantha identified at least two…
The pyrrolizidine alkaloid (PA) lycopsamine and the guaianolide cumambrin B were isolated from Eupatorium maculatum L. Their…
Seven pyrrolizidine alkaloids (PAs) have been isolated from Lithospermum canescens and their structures determined by…
Summary. Tracer feeding studies with radioactively labeled pyrrolizidine alkaloids (PAs) were performed to attain experimental…
Pyrrolizidine alkaloids (PAs), acquired by adults or larvae of Danainae and Ithomiinae butterflies and Arctiidae moths from…
(-)- and (+)-trachelanthic and (-)- and (+)-viridifloric acids were synthesized and their isopropylidene derivatives were…