4-Pentenoic acid also known as allyl acetic acid or 4-pentenate belongs to the class of organic compounds known as straight chain fatty acids. These are fatty acids with a straight aliphatic chain. 4-Pentenoic acid is a very hydrophobic molecule practically insoluble (in water) and relatively neutral.

Hosenkoside N is a baccharane glycoside isolated from lmpatiens buhamina.

2-(4-Hydroxyphenylazo)benzoicacid is a spectrophotometric probe that shows changes in absorption spectra upon binding to proteins and binds to bovine serum proteins.