SPIRO[2H-1-BENZOPYRAN-2,4'-[4H]CYCLOPROP[E]- AZULENE],1',1'A,2',3,3',4,4'A,5',6',7',7'A,7'BDODECAHYDRO- 1',1',7'-TRIMETHYL-,(1'AR,2R,- 4'AS,7'R,7'AS,7'BS)-