Crinane and Lycorane Type Alkaloids from Zephyranthes Citrina.
Machocho, Alex K.
Herrera, M. R.
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Eight alkaloids have been isolated from Zephyranthes citrina (Amaryllidaceae). The alkaloid oxomaritidine is reported here for the first time from a natural source. The structure and stereochemistry of the alkaloids were determined by physical and spectroscopic methods.