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.
Pyridine is often present in the hydrophobic part. Structure of this group, its size and branching have essential significance for the resultingproperties of the surfactant. The polar part (hydrophilic), which is responsible forthe molecule solubility in water and polar organic solvents, is in most cases acidic or basic. If such a group is present it forms salt with a cation or anion,respectively and becomes