Colchicum kesselringii

New proaporphines are crociflorinone (1), obtained from Colchicum kesselringii (C. crocifbrum), and roehybrine (2), found in Roemeria hybrida (L.) DC. ... 

To the best of our knowledge few natural (-)-allocolchicinoids have been reported. As mentioned above, natural (-)-allocolchicine 1 was isolated from C. autumnale [3,4] and C. kesselringii [5]. 3-Demethyl-allocolchicine 6, identified previously as the methyl ester of 2-demethylcolchicinic acid, was also isolated from the latter plant [5], Other natural allocolchicinoids, also named dibenzocycloheptylamines, have been reported. Colchibiphenyline 7 was isolated from Colchicum ritchii R. Br. [28] and (—)-androbiphenyline 8 from Androcymbium palaestinum (Boiss.) Bak. [29], C. ritchii [28] and Colchicum decaisnei Boiss. [30]. The latter plant also produces (-)-jerusalemine 9, (-)-salimine and (-)-suhailamine [30], though the exact structure of salimine was later questioned [31] and suhailamine had a reported structure identical to that of allocolchicine. 

Alkaloid from Colchicum autumnale, C. kesselringii, C. luteum, Merendera robusta and M. Jolantae (Liliaceae). Used as 0.02M CHCI3 soln. as an extractive indicator in the EDTA titration of Cu(/7) (pH 4.5). Needles (EtOAc). Sol. CHCI3. Mp 175-177°. [oef -256° (c,... 

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