Alkaloids from roots of Aconitum crassicaule.
From the roots of Aconitum crassicaule, four diterpenoid alkaloids were isolated. Two of these were identified as chasmanine (5) and yunaconitine (4). The other two, crassicauline A and crassicauline B, are new alkaloids. The structure of crassicauline A, C (35)H (49)O (10)N, has been elucidated as structure (1) on the basis of chemical and spectral data, while the structure of crassicauline B, C (27)H (31)O (4)N, is still to be determined.
Fengpeng
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Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing, People's Republic of China.
Qicheng
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