Chasmanthinine

The crystal structure of chasmanthinine, C₃₆H₄₉NO₉, a C₁₉ norditerpenoid alkaloid which has been isolated from the roots of Aconitum chasmanthum Stapf ex Holmes, contains independent molecules separated by normal van der Waals distances. The mean bond distances are: N-C_sp³ 1.468 (11), C_sp³-C_sp³ 1.54 (2), C_sp²-C_sp² 1.471 (2), O-C_sp³ 1.428 (18), O-C_sp² 1.338 (2), and C=O 1.205 (4) Å. The fused ring system contains one boat, one half-chair, two chair and two envelope conformations.

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