The molecule is an organic heterotricyclic compound that is 2,3-dihydro-9H-[1,4]dioxino[2,3-h]chromen-9-one substituted by 4-hydroxy-3-methoxy phenyl group at position 3, a hydroxymethyl group at position 2 and a methoxy group at position 5 (the 2S,3R stereoisomer). An epimer of cleomiscosin A, it is isolated from the aerial parts of Rhododendron collettianum and exhibits inhibitory activity towards the enzyme tyrosinase. It has a role as a metabolite and an EC 1.14.18.1 (tyrosinase) inhibitor. It is a member of phenols, an aromatic ether, an organic heterotricyclic compound, a delta-lactone and a primary alcohol.
(2S,3R)-3-(4-hydroxy-3-methoxyphenyl)-2-(hydroxymethyl)-5-methoxy-2,3-dihydropyrano[3,2-h][1,4]benzodioxin-9-one