Retene is an aromatic molecule that occurs when forest fires happen - burning trees makes it.
The isopropyl is a dead giveaway for a terpene, which are ubiquitous among natural products (and their forest-fire synthesized derivatives).
It makes a picrate, too!
Brings me back to the good old days of picking isoprene units out of terpenes on natural products chem tests. Really good times when there's hydride or methyl shifts.