Content : minimum 12 ml/kg of essential oil of which a minimum of 40 per cent is thymol and carvacrol (both C 10 H 14 O;M r 150.2) (anhydrous drug).

• 本品（以干燥品计）含挥发油不得少于12 ml/kg，其中百里酚和香芹酚（均为C 10 H 14 O）的总和不得少于40%25。