Abstract
From Corydalis cava (L.) Sch. et K. (C. tuberosa DC) (Papaveraceae: genus Corydalis Med.), a mixture of alkaloids (0.53%) was isolated. The main alkaloid was (+)‐bulbocapnine, and the minor alkaloids were coptisine, (+)‐domestine, adlumidiceine, (+)‐predicentrine, protopine, (‐)‐capnoidine, (+)‐stylopine, (+)‐isoboldine, 8‐oxocoptisine, 1,2‐methylenedioxy‐6a, 7‐dehydroaporphine‐10,11‐quinone, and corysamine. In addition, fumaric acid was obtained. Coptisine, adlumidiceine, predicentrine, 8‐oxocoptisine, corysamine, 1,2‐methylenedioxy‐6a, 7‐dehydroaporphine‐10,11‐quinone, and isoboldine were found in C. cava for the first time, but rhoeadine and papaverrubine alkaloids were not detected. Predicentrine and isoboldine were identified on the basis of the UV, IR, mass, and PMR spectra.
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