Abieslactone

The

(2R)-2-[(2R)-2-[(3R,5R,9S,10R,13R,14R,17R)-3-methoxy-4,4,10,13,14-pentamethyl-2,3,5,6,9,11,12,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-17-yl]propyl]-4-methyl-2H-furan-5-one present in Abies plants