Iridoids. An Updated Review, Part II

Melanogenesis Inhibitory Activities of Iridoid-, Hemiterpene-, and Fatty Acid-glycosides from the Fruits of Morinda citrifolia (Noni)

“…The significant NOE interaction between H-5 and H-6 established that these protons were on the other face of the molecule. Since most of the naturally occurring iridoid glycosides have been reported to possess an a-orientation for H-1 18) , in the structure of , H-1 and H-9 have been designated as a, whereas H-5 and H-6 as b. According to molecular models, there is greater rigidity and less flexibility in the transfused system than in the usual cis-fused iridoids, and hence the NOE interactions observed in the NOESY spectrum of should be considered conclusive.…”

Dirhamnosyl flavonoid and other constituents from Brillantaisia palisatii

“…Trees, however, are rare in the family 4 . The chemistry of Acanthaceae shows a great diversity of different compounds such as alkaloids 5 , iridoids 6 , lignans 7 , flavonoids 8 , terpenoids 9 and phenylpropanoid glycosides 10 . Some species of this family are used in folk medicine to treat several diseases, especially gastrointestinal ailments.…”

Ácido 15-desmetilisoplumierídeo, um novo iridóide isolado das cascas de Plumeria rubra e do látex de Himatanthus sucuuba

“…As estruturas químicas de 2 (15-desmetilplumierídeo), 3 (plumierídeo) e 4 (isoplumierídeo) foram identificadas por comparação de seus dados espectroscópicos (IV e RMN) e constantes físicas com dados descritos na literatura para estes iridóides [10][11][12][13] 15 . Assim, o primeiro iridóide foi isolado no Brasil, mais precisamente no estado do Rio de Janeiro 15 .…”