Description
Isolated from Thymus vulgaris (thyme), Citrus limon (lemon), Citrus unshiu (satsuma) and Origanum vulgare (oregano). Requires Mg2+. Mn2+ less effective. The reaction involves a 1,2-hydride shift. The 5-pro-S hydrogen of geranyl diphosphate is lost. Traces of several other monoterpenoids are formed in addition to γ-terpinene