Leaves contain naphtha 2 to 3.7%. Belong to plant the small breed zhang yellow leaf contains naphtha 2.6 ~ 3.3%, among them 1, *-YeSu eucalyptus content of about *0%, camphor 0.*5%, other ingredients have lemon aldehyde group, aldehydes, alpha pinene, Kan ene, alpha loose oil ene, umbrella to gather flowers-alcohol, meat, linalyl alpha benzyl alcohol and loose oil is broad and a half. Other varieties of zhang yellow a small leather YeFang fresh leaf of zhang haracteristicof 1.7 ~ 3.5%, leaf oil contain monoterpenes compounds give priority to, also contain eugenol, 1, *-YeSu eucalyptus, Kan ene, alpha water celery ene, to gather flowers-umbrella meal, camphor, linalyl alcohol, alpha benzyl alcohol and loose oil is broad and a half.