TOAC (“T-O-A-C”) is a cyclic, radical one of these compounds used as a spin label in EPR spectroscopy. Isotope-labeled versions of these compounds are used in SILAC (“SYE-lack”) experiments. (10[3])Derivatives (-5[1])of one of these compounds react with boroxines (“bor-OCK-seens”) to form asymmetric Corey–Bakshi–Shibata catalysts. These compounds are conjugated (10[2])onto Wang (10[1])resins using coupling agents (10[1])like (10[1])benzotriazoles (10[1])or (10[1])carbodiimides (10[1])(“carbo-die-IM-mydes”) in Merrifield solid-phase (10[1])synthesis. (10[1]-5[1])In that method, (10[1])these compounds (10[1])must be protected by (10[1])groups (10[1])like Boc (10[2])(“bock”) and Fmoc (10[7])(“F-mock”). These (10[1])compounds are formed (-5[1])by treating (-5[1])an aldehyde with hydrogen cyanide (-5[1])then hydrolysis during the Strecker (10[1])synthesis. (10[9]-5[4])Simple (10[2])examples (10[1])of these (-5[1])compounds can be (10[1])formed by (10[1])electrical discharges, (10[2])as demonstrated by Miller and Urey. (10[2]-5[1])For (10[1]-5[1])10 points, (10[4])name these (10[1])building blocks (10[3])for polypeptides. (10[4])■END■ (10[18]0[2])