The new alkaloids flavinantine (I; R1= R3= Me, R2= H) and flavinine (I; R1= R2= H, R3= Me), along with sinoacutine (II; R1= H, R2= Me) and norsinoacutine (II; R1= R2= H) have been isolated from C. flavens. Isolation procedures and work leading to structural elucidation are described. Studies on the acid rearrangement of some norsinoacutine derivatives are also reported.
K. L. Stuart, C. Chambers and D. Byfield, J. Chem. Soc. C, 1969, 1681 DOI: 10.1039/J39690001681
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