Studies on the constituents of bulbs of the orchid Prosthechea michuacana and antioxidant activity

Abstract

6), a known compound. The compounds were identified by spectral analysis and comparison with spectroscopic data reported in the literature. Compounds 3, 4, 5, and 6 showed DPPH and ABTS radicalscavenging and anti-lipid peroxidation activities, but none of the isolated triterpenes showed promising antioxidant activity.

Effect of flavonoids fromProsthechea michuacanaon carbon tetrachloride induced acute hepatotoxicity in mice

“…Some studies on this plant's properties reported relaxant and antispasmodic activity (Vargas-Solis & Perez-Gutierrez, 2009). In other scientific reports, its antiinflammatory and wound healing activity has been demonstrated (Perez-Gutierrez & Vargas-Solis, 2009a), and we found antioxidant activity in the constituents of the orchid bulbs (Perez-Gutierrez & Neira-Gonzales, 2010). In previous studies, we evaluated the hepatoprotective effects of a methanol extract of P. michuacana against paracetamol and carbon tetrachloride (CCl 4 )-induced hepatic damage in albino rats (Perez-Gutierrez & Vargas-Solis, 2009b).…”

Three Novel Biphenanthrene Derivatives and a New Phenylpropanoid Ester from Aerides multiflora and Their α-Glucosidase Inhibitory Activity

“…The family Orchidaceae is divided into 5 subfamilies, i.e., Epidendroideae, Orchidoideae, Vanilloideae, Cypripedioideae, and Apostasioideae [ 44 ]. So far, dimeric phenanthrenes have been reported from only two subfamilies, i.e., Epidendroideae (the genera Stanhopea, Bletilla, Pholidota, Pleione, Otochilus, Arundina, Bulbophyllum, Dendrobium, Monomeria, Cremastra, Agrostophyllum, Liparis, Cyrtopodium , Eria , Eulophia , Cirrhopetalum , Calanthe, Lusia, and Prosthechea ) and Orchidoideae (the genera Spiranthes and Gymnadenia ) [ 34 , 39 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 ]. No biphenanthrenes have been found outside these two subfamilies.…”

Five New Biphenanthrenes from Cremastra appendiculata

“…The PE and EtOAc partitions were chromatographed over silica gel, Sephadex LH-20 and ODS columns, and semi-preparative HPLC to obtain eleven biphenanthrenes (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11) (Figure 1). Their structures were elucidated based on extensive spectroscopic analyses (Supplementary Materials).…”

“…The phenanthrenes isolated thus far may be classified into three major groups: monophenanthrenes, biphenanthrenes, and triphenanthrenes, and most natural phenanthrenes occur in monomeric form [1]. To date, less than one hundred biphenanthrenes and two triphenanthrenes have been isolated from the Orchidaceae family [2][3][4][5][6][7][8][9][10][11][12][13]. Biphenanthrenes have been reported to possess various biological activities including cytotoxicity, antimicrobial, spasmolytic, anti-inflammatory, antiplatelet aggregation, and antiallergic activities [1].…”