title: A new naphthoquinone from Pyrola japonica.
abstract: A new naphthoquinone, 5,8-dihydro-2,7-dimethyl-[1,4]naphthoquinone (1), which was named 5,8-dihydrochimaphilin, isolated from an ethyl acetate soluble fraction from the root of Pyrola japonica, together with chimaphilin (2). Compound 1 was transformed rapidly to 2 upon exposure to air by HPLC analysis. This fact supported that chimaphilin (2) may be an artifact from 1.
authors.affiliation: Korea Research Institute of Bioscience and Biotechnology, Taejon.
authors.forename: S
authors.initials: S
authors.lastname: Lee
authors.forename: R
authors.initials: R
authors.lastname: An
authors.forename: B
authors.initials: B
authors.lastname: Min
authors.forename: M
authors.initials: M
authors.lastname: Na
authors.forename: C
authors.initials: C
authors.lastname: Lee
authors.forename: S
authors.initials: S
authors.lastname: Kang
authors.forename: H
authors.initials: H
authors.lastname: Maeng
authors.forename: K
authors.initials: K
authors.lastname: Bae
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification*; D009285:Naphthoquinones / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: C457231:5,8-dihydrochimaphilin; D000972:Antineoplastic Agents, Phytogenic; D009285:Naphthoquinones; C057774:chimaphilin