8,9-Z-Avermectin B1b, 100 µg/ml, Acetonitrile, 1

Acetone-2-13C,2000 µg/mL,MeOH,1mL,

alphaßß (20R)-Cholestane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 69483-47-2

Chlorobenzilate, 100 µg/ml, Ethyl acetate, 1ml