Purity (GC) Conditions: Column: DB (100% -polydimethylsiloxane ); Length: 30 m, I.D.: 0.25 mm, Film: 1.0 µl; Injection temp: 250 °C; Detector(FID) temp: 275 °C; Column temp; 120 °C initial, programmed at 10 °C/min to 250 °C, hold for 15 min; Sample: 0.2 µl neat.