Isoflavanes are a class of isoflavonoids, which are themselves types of polyphenolic compounds. They have the 3-phenylchroman (isoflavan, CAS number: 4737-26-2, molecular formula: C<sub>15</sub>H<sub>14</sub>O, exact mass: 210.1044646 u) backbone.
Philenoptera laxiflora (syn. Lonchocarpus laxiflorus) contains two isoflavanes: lonchocarpane and laxiflorane.