Q. 2h and J. =. ,

C. Nmr, MHz, CDCl3) ? = 202.4 (C-8), 165.7 (C-9, vol.158

, C-4a), 136.7 (C-5a), vol.116

, C-13), 55.6 (C-11), vol.66

. Lrms-esi,

, -methylbut-2-en-1-yl)oxy)-3-((triethylsilyl)oxy)

, TLC (C5/EtOAc, vol.90, issue.10

H. Nmr, 83 (1H, s, H-10), 6.71 (1H, s, H-4), 6.61 (1H, s, H-2), 400 MHz, CDCl3) ? = 14.94 (1H, s, vol.6

C. Nmr, MHz, CDCl3) ? = 202.4 (C-8), 165.4 (C-9, vol.161

, C-13), 136.4 (C-5a), vol.138

, C-6), 65.0 (C-11), 64.8 (C-16), 39.8 (C-5), vol.101, pp.94-96

. Lrms-esi-;-m-+-h]+-calcd, , vol.27, p.501

, 7-dimethylocta-2,6-dien-1-yl)oxy)-8-(ethoxymethoxy)-9-hydroxy-3-((triethylsilyl)oxy)-3,4-dihydroanthracen-1(2H)-one (219)

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, Yielded 34 mg (18%)

, TLC (C5/EtOAc, vol.90, issue.10

H. Nmr, 61 (1H, s, H-2), 5.50 (1H, t, J = 6.3 Hz, H-12), 5.35 (2H, s, H-20), 5.08 (1H, t, 6.83 (1H, s, H-10), 6.71 (1H, s, H-4), vol.6

C. Nmr, MHz, CDCl3) ? = 202.2 (C-8), 165.4 (C-9, vol.161

, C-2), 94.2 (C-20), 66.6 (C-6), 65.0 (C-11), 64.8 (C-21), 136.4 (C-5a), vol.131, pp.123-130

. Lrms-esi,

, -(cyclopentyloxy)-8-(ethoxymethoxy)-9-hydroxy-3-((triethylsilyl)oxy)-3,4-dihydroanthracen-1(2H)-one (221)

, Yielded 74 mg (18%)

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H. Nmr, CDCl3) ? = 14.95 (1H, s, OH-9, MHz, issue.400

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