जापाननि मिन्टनि जौगाहोनाय बिलाइफोराव बिजिरसंनायनिफ्राय मिथिनो मोनबाय दि गोदान बिलाइफोरा थाव लाथुमनायाव बारा सांग्रां जायो ।
It is known from a study conducted on developed leaves of Japanese mint that young leaves are more active in collecting oil .