Conferdione — A new coumarin from Ferula conocaula

Sesquiterpene coumarins from the roots of Ferula assa-foetida

“…The NMR data indicated that 1 was an epimer of conferdione, which was isolated from fruit and roots of Ferula conocula several years ago. 15 Although the coupling constants suggested the stereochemistry of H-5¢, H-9¢, and H-11¢, the rel-ative stereochemistry of the chiral centers could be established by examining the various cross peaks in the NOESY spectrum, Fig. 1.…”

New Entry to 9-Acetyl/Formyl-Substituted 2H,8H-Pyrano[2,3-f]Chromen-2-ones through Baylis–Hillman Reaction

“…[1][2][3][4][5][6][7][8][9][10] Dicoumarol, [11] which has anticoagulant activity, antibiotics novobiocin and chlorobiocin, [12,13] and Calonides A and B, [14] which inhibit HIV-1 replication in vitro, represent some of the bioactive substituted 2H-chromen-2-ones.…”