T 2236 (OTTO) Trimethyl orthovalerate, 97% Cas 13820-09-2 - used in the synthesis of 1,2,4-triazolo[1,5-c]pyrimidine derivatives as human adenosine A3 receptor ligands. T 2236 (OTTO) Trimethyl orthovalerate, 97% Cas 13820-09-2 - used as a precursor to prepare N-sulfonyl and N-sulfinyl imines and imidates.