Spiro[azuleno[4,5-b]furan-9(2H),3′-[3H]benz[1,8]- azuleno[4,5-b]furan]-2,2′,8,9′(1’H,3H,4’H)- tetrone,3a,4,5,5′,5’a,6,6′,6a,7,7′,7’a,8′,9a,9b,- 10’a,10’b-hexadecahydro-5’a-hydroxy-1′,3,6,- 8′-tetrakis