: B 2523 ( OTTOKEMI ) sec-Butylzinc bromide solution , 0.5 M in THF Cas- 171860-66-5 used in chemical research can be used to prepare 6-sec-butyl-2-chloro-3-(1-hydroxy-4- methoxymethoxyphenylmethyl)pyrazine, a key intermediate for the synthesis of septorin