Herbicide Free Acid Standard

C30 Pentacyclic triterpane III (or Z ); Ring A spiro oleanane; Methyl-3ß,4 alpha,10 alpha,18 alpha)-1,5-cyclo-24-nor-1,10-seco-oleanane, neat, Solvent-neat, Unit ca. 5µg, # of units-1, Cas.no. 190603-63-5

Vinylene Carbonate (stabilized with BHT), >98%, 5g

Cortexolone, 100mg