Title: Stereostructure of Excoecarin H, a Novel seco-Labdane-Type Diterpene from Excoecaria agallocha.
Abstract: A novel seco-labdane-type diterpene, excoecarin H was isolated from resinous wood of Excoecaria aggallocha collected from Okinawa prefecture. Stereochemistry of the new diterpene was determined on the basis of chemical and physicochemical evidence.