Substances from the plants of the subfamily Wurmbaeoideae and their derivatives. LVIII. The constitution of cornigerine

Colchicine Alkaloids and Synthetic Analogues: Current Progress and Perspectives

“…A natural analogue of colchicine ( 1 ) in which the methoxy groups at positions 2 and 3 are replaced by a methylenedioxy bridge (forming a dioxol ring) is the alkaloid cornigerine ( 8 ) isolated from Colchicum cornigerum (Figure ).…”

Nmr Studies of Colchicine and its Photoisomers, β- and λ-Lumicolchicines

“…These experiments, however, require that the 'H-nmt spectrum be assigned. The *H-nmr analysis of colchicine has been described, but is incomplete for the protons in the cycloheptadiene ring (24)(25)(26)(27)(28)(29) and the methoxyl protons (30). This led us to reestablish the proton assignments of colchicine.…”

Mass Spectrometry

“…Particular alkaloids for which mass spectra are reported include the steroidal alkaloids funtuline (519), conkurchine (518), and pregnane derivatives (520), ibogamine (146), aspidosperma alkaloids (821, 947), some vinca alkaloids (802,803,1060), vindorosine (765), rhazidin (1005), carpaine (1007), other curare alkaloids (462, 768), halfordinol and related oxazoles (231), extracts of leptospermum scoparium and of prostaglandin (197), cornigerine (228), chanootin (811), lochnericine (764), some 2-acvlindol alkaloids (901), secalonic acids (361, 362), villalstonin (461), lunidine and lunidonine (924), buxines (284), allosecurinine (183), norsecurinine (937), lycofawcine (42), thiobinupharidine (6), burnamicine (59), hydroxyconessine (398), amaryllisine (151), muramine (227), fiuorocarpamin and indolopyridocoline (539), pyrrolizidine alkaloids of labernum (801), Kurchi alkaloids (1064), arundoin (315), vallesamine (1117), akuammaline (822), affininine and affinisine (173), pronuciferine, stepharine (1055), and lappaconitine (564) Other Complex Molecules. Richter and Biemann (907) discuss the high resolution spectra of penicillin deriva- mycetes {127).…”