title: Ionization of shikonin derivatives using negative-ion electrospray mass spectrometry: [M-H]- versus [M + e]•-.
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Zhang
authors.forename: Shun
authors.initials: S
authors.lastname: Xiao
authors.forename: Xiong
authors.initials: X
authors.lastname: Li
authors.forename: Xing
authors.initials: X
authors.lastname: Zeng
authors.forename: Yiyu
authors.initials: Y
authors.lastname: Cheng
mesh_terms: D000880:Anthraquinones / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D009285:Naphthoquinones / Q000737:chemistry*; D010421:Pentanoic Acids / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D000880:Anthraquinones; D004365:Drugs, Chinese Herbal; D007477:Ions; D009285:Naphthoquinones; D010421:Pentanoic Acids; C550538:isovalerylshikonin; C016101:shikonin; C032573:beta, beta-dimethylacrylshikonin; C073944:acetylshikonin