title: Transformation of alkaloids of the Colchicine type in leaves and flowers of Colchicum autumnale and C. byzantinum.
abstract: It was found that the so far described variations in the content of colchicine alkaloids in leaves and flowers of Colchicum autumnale L. and C. byzantinum Ten. are due to enzymatic O-demethylation and degradation of colchicine (I), N-deacetyl-N-formylcolchicine (XI), and demecolcine (XVII) during drying and storing of the plant material. A simplified method was elaborated to separate the neutral, phenolic, basic, and basic-phenolic fractions of tropolone alkaloids.
authors.affiliation: Institute of Chemistry, Medical Faculty, Palacký University, Olomouc, CSSR.
authors.forename: F
authors.initials: F
authors.lastname: Santavý
authors.forename: V
authors.initials: V
authors.lastname: Preininger
authors.forename: V
authors.initials: V
authors.lastname: Simánek
authors.forename: H
authors.initials: H
authors.lastname: Potesilová