车前酯甙，镇咳，祛痰，平喘，抗炎，抑制5脂肪氧合酶，甙元以羧基和糖的端基碳相连接的俄类是酯甙。酯甙的甙键既有缩醛性质又有酯的性质，易为稀酸和稀碱水解。