Opopanax
（重定向自Mecca balsam）
Opopanax, also known as opobalsam, refers to a number of gum resins (natural substances that are a mixture of water-soluble gums and alcohol-soluble resins) traditionally considered to have medicinal properties. Pliny (Historia Naturalis) and Dioscorides (De Materia Medica) described various kinds with uncertain identifications, which have been distinguished as: