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- W2068673575 abstract "Two pyrrolizidine alkaloids, symphytine (I), a new compound, and echimidine (II) have been isolated from the dried roots of Symphytum officinale. Both have a retronecine nucleus esterified on the 7-hydroxyl group with angelic acid. The other esterifying acid of symphytine is l-viridifloric acid (III), identical with the authentic sample. The structure of symphytine, a diastereoisomer of echiumine (retronecine esterified with angelic acid and trachelanthic acid), has been confirmed. A large amount of allantoin has also been isolated from the dried roots and leaves." @default.
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- W2068673575 date "1968-01-01" @default.
- W2068673575 modified "2023-09-24" @default.
- W2068673575 title "Studies on Constituents of Crude Drugs. I. Alkaloids of Symphytum officinale LINN." @default.
- W2068673575 doi "https://doi.org/10.1248/cpb.16.2512" @default.
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