N-ethyl-5-phenylisoxazolium-3'-sulfonate

N-ethyl-5-phenylisoxazolium-3′-sulfonate

[¦en ¦eth·əl ¦fīv ¦fen·əl‚ī·säk·sə′zō·lē·əm ¦thrē‚prīm ′səl·fə‚nāt]
(organic chemistry)
C11H11NO4S Crystals that decompose at 207-208°C; used to form peptide bonds. Also known as Woodward's Reagent K.