Hydroquinones

Hydroquinone, also known as benzene-1,4-diol or quinol, is an aromatic organic compound that is a type of phenol, a derivative of benzene, having the chemical formula C6H4(OH)2. It has two hydroxyl groups bonded to a benzene ring in a para position. It is a white granular solid. Substituted derivatives of this parent compound are also referred to as hydroquinones. The name "hydroquinone" was coined by Friedrich Wöhler in 1843.

chemical compound

Mitoxantrone (INN, BAN, USAN; also known as Mitozantrone in Australia; trade name Novantrone) is an anthracenedione antineoplastic agent.

chemical compound

'''tert-Butylhydroquinone (TBHQ, tertiary butylhydroquinone, tBHQ') is a synthetic aromatic organic compound which is a type of phenol. It is a derivative of hydroquinone, substituted with a tert''-butyl group.

thumb|right|350px|Resonance (chemistry)|Resonance structures of a semiquinone Semiquinones (or ubisemiquinones, if their origin is ubiquinone) are free radicals resulting from the removal of one hydrogen atom with its electron during the process of dehydrogenation of a hydroquinone, such as hydroquinone itself or catechol, to a quinone or alternatively the addition of a single hydrogen atom with its electron to a quinone. Semiquinones are highly unstable.

Etamsylate (sometimes spelled ethamsylate) is an antihemorrhagic agent which is believed to work by increasing resistance in the endothelium of capillaries and promoting platelet adhesion. It also inhibits biosynthesis and action of those prostaglandins which cause platelet disaggregation, vasodilation and increased capillary permeability.

Menadiol is an organic compound with the formula C6H4(COH)2(CH)(CH3). It is formally the p-hydroquinone derivative of 2-methylnaphthalene. The name vitamin K4 can refer to: specifically this compound, its various esters, e.g. menadiol diacetate (acetomenaphthone), menadiol dibutyrate, menadiol dimalonate, or its various salts, like menadiol sodium diphosphate (Kappadione) menadiol sodium disulfate.

chemical compound

Naphthazarin, often called 5,8-dihydroxy-1,4-naphthoquinone or 5,8-dihydroxy-1,4-naphthalenedione (IUPAC), is a naturally occurring organic compound with formula , formally derived from 1,4-naphthoquinone through replacement of two hydrogen atoms by hydroxyl (OH) groups. It is thus one of many dihydroxynaphthoquinone structural isomers.

2,5-Dihydroxy-1,4-benzoquinone or '2,5-dihydroxy-para-benzoquinone' is an organic compound with chemical formula , formally derived from 1,4-benzoquinone by replacing two hydrogen atoms with hydroxyl (OH) groups. It is one of seven dihydroxybenzoquinone isomers. It is a yellow solid with planar molecules that exhibits ferroelectric properties.

1,4-Dihydroxyanthraquinone, also called quinizarin or Solvent Orange 86, is an organic compound derived from anthroquinone. Quinizarin is an orange or red-brown crystalline powder. It is formally derived from anthraquinone by replacement of two hydrogen atoms by hydroxyl (OH) groups. It is one of ten dihydroxyanthraquinone isomers and occurs in small amounts (as a glycoside) in the root of the madder plant, Rubia tinctorum.

chemical compound

Quinalizarin or 1,2,5,8-tetrahydroxyanthraquinone is an organic compound with formula . It is one of many tetrahydroxyanthraquinone isomers, formally derived from anthraquinone by replacement of four hydrogen atoms by hydroxyl (OH) groups at the 1, 2, 5, and 8 positions.