5b,7-Dihydroxy-2,2,10,10-tetramethyl-5b,13a-dihydro-2H,6H,10H-chromeno[6′,7′:4,5]furo[2,3-b]pyrano[3,2-g]chromen-6-one

2H,6H,10H-Pyrano[3′,2′:5,6]benzofuro[2,3-b]pyrano[3,2-g][1]benzopyran-6-one, 5b,13a-dihydro-5b,7-dihydroxy-2,2,10,10-tetramethyl-

5b,7-Dihydroxy-2,2,10,10-tetramethyl-5b,13a-dihydro-2H,6H,10H-chromeno[6′,7′:4,5]furo[2,3-b]pyrano[3,2-g]chromen-6-on

5b,7-Dihydroxy-2,2,10,10-tetramethyl-5b,13a-dihydro-2H,6H,10H-chromeno[6′,7′:4,5]furo[2,3-b]pyrano[3,2-g]chromen-6-one

5b,7-Dihydroxy-2,2,10,10-tétraméthyl-5b,13a-dihydro-2H,6H,10H-chroméno[6′,7′:4,5]furo[2,3-b]pyrano[3,2-g]chromén-6-one

2H,6H,10H-chromeno[6′,7′:4,5]furo[2,3-b]pyrano[3,2-g]chromen-6-one, 5b,13a-dihydro-5b,7-dihydroxy-2,2,10,10-tetramethyl-

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