N. Choukchoubraham et al., ISOLATION, STRUCTURE DETERMINATION AND SYNTHESIS OF NEW DIHYDROISOCOUMARINS FROM GINKGO-BILOBA L, Tetrahedron letters, 35(23), 1994, pp. 3949-3952
New optically active 8-hydroxy-3-alk(en)yl-3,4-dihydroisocoumarins 2a-
c were isolated from Ginkgo biloba L. fruits. The absolute configurati
on was determined to be R by comparison with both enantiomers of the 8
-hydroxy-3-tridecyl-3,4-dihydroisocoumarin synthesized from optically
active epichlorhydrins.