Crystal structure of 11-hydroxy-5-(5-hydroxy-4-methylpent-3-enyl)- 4,5,13-trimethyl-3,8-dioxatricyclo[7.4.0.02,6]trideca-l(13),2(6),9(10),11-tetraen-7-one, C20H24O5

Synthesis of 3-Hydroxy-2-hydroxy(phenyl)methyl-3-methyl-2,3-dihydro-4H-furo[3,2-c]chromen-4-one from 4-Hydroxycoumarin

“…The furochromene fragment is planar within ± 0.097 Å. Small deviation of the C 2 atom [by 0.178(5) Å] from the plane formed by the other atoms in the furan ring should be noted [12]. Similar deviation (0.172 Å) was found for the closest analog of compound IV, 11-hydroxy-5-(5-hydroxy-4-methylpenten-3-yl)-4,5,13-trimethyl-3,8-dioxatricyclo-[7.4.0.0 2, 6 ]trideca-1(13),2(6),9(10)11-tetraen-7-one ISSN 1070-4280, Russian Journal of Organic Chemistry, 2011, Vol.…”

“…Non-hydrogen atoms are shown as thermal vibration ellipsoids with a probability of 30%. [12]. Deviation of the corresponding atom in the other analog, 3-…”