月桂烯，或称为β-月桂烯，是一种天然的烯类有机化合物。它被归类到烃类的萜烯中。常温下呈无色或淡黄色油状液体。可以溶于乙醇、乙醚、氯仿等有机溶剂当中，并能与大多数其它香料混合。

天然的月桂烯可以从月桂叶、马鞭草、香叶和其他植物的精油中提取。人工合成则主要采用热分解法，以β-蒎烯为原料，经热分解获得。另外，也可以芳樟醇等作为反应物制得。

月桂烯是香料产业中最重要的化学品原料之一，主要用于合成古龙香水和消臭剂等。由于其具有令人愉快的甜香脂气味，偶尔也被直接使用。另外，月桂烯也是合成香精和香料的一种极其重要的中间体，如合成薄荷醇，柠檬醛，香茅醇，香叶醇，橙花醇和芳樟醇等。

Myrcene, or β-myrcene, is an olefinic natural organic hydrocarbon. It is more precisely classified as a monoterpene. Monoterpenes are dimers of isoprenoid precursors, and myrcene is one of the most important. It is a component of the essential oil of several plants including bay, cannabis, ylang-ylang, wild thyme, parsley, and hops. It is produced mainly semi-synthetically from myrcia, from which it gets its name. It is a key intermediate in the production of several fragrances. α-Myrcene is the name for the structural isomer 2-methyl-6-methylene-1,7-octadiene, which is not found in nature and is little used.