Definition: Azoles with an OXYGEN and a NITROGEN next to each other at the 1,2 positions, in contrast to OXAZOLES that have nitrogens at the 1,3 positions.
N-ethyl-5-phenylisoxazolium-3'-sulfonate [ Woodward's reagent K,reagent K, Woodward's ] reagent for rapid modification of carboxyl groups in proteins; structure
4156-16-5
2-ethyl-5-(3-sulfophenyl)isoxazolium, hydroxide, inn er salt