Dehydroaustinol

(1′R,2′S,3S,7′S,9′R,12′S,13′S)-8′-Hydroxy-2,2,2′,9′,13′-pentamethyl-6′,16′-bis(methylene)-6H-spiro[pyran-3,5′-[10,14,17]trioxapentacyclo[7.6.1.1~7,12~.0~1,12~.0~2,7~]heptadecane]-6,11′,15′-trione

Dehydroaustinol