Summary Summary. Acute intermittent porphyria (AIP) is one of the liver (hepatic) porphyrias. AIP is caused by low levels of porphobilinogen deaminase (PBGD), an enzyme also often called hydroxymethylbilane synthase.
Pyridine-N-oxide is the heterocyclic compound with the formula C 5 H 5 NO. This colourless, hygroscopic solid is the product of the oxidation of pyridine. It was originally prepared using peracids as the oxidising agent. The molecule is planar.yridine-N-oxide is the heterocyclic compound with the formula C 5 H 5 NO. This colourless, hygroscopic solid is the product of the oxidation of pyridine. It was originally prepared using peracids as the oxidising agent. The molecule is planar.
It is not iron(IV) sulfide; the iron is in a +2 oxidation state, combined with an S 2 2- ion (the sulfur analog of the peroxide ion). Pyrite burns when heated to form sulfur dioxide and iron(III) oxide: The reaction is sometimes used in industry as a source of sulfur dioxide for the manufacture of sulfuric acid.he same pigment can be obtained from the reaction of iron(II) with ferricyanide: The product of the reaction is the blue color ingredient in many artist's pigments, printing inks, and dyes (including Berlin blue, Chinese blue, mineral blue, Paris blue, and Prussian blue).