Structural elucidation of 1-(3-acetyl-2,6-dihydroxy-4-methoxyphenyl)-4,5-dihydroxy-2-methylanthracene-9,10-dione isolated from Bulbine latifolia (L.) Wild, C24H18O8

6 - ( 1 , 3 - Dihydroxy - 3 - phenylpropylidene ) - 5 - hydroxy - 2 , 2 , 4 - trimethylcyclohex - 4 - ene - 1 , 3 - dione

A novel compound involved in the aroma of the fruit Campomanesia lineatifolia was isolated; the structure was determined by spectroscopic methods, mainly 1D and 2D NMR.

3 , 4 - Dihydroxy - 9 , 10 - secoandrosta - l , 3 , 5 ( 10 ) - triene = 9 , 17 dione 4 ,

Kinetic studies with 3,4-dihydroxy-9, IO-secoandrosta1,3,5(10)-triene-9,17-dione-4,5-dioxygenase gave intersecting initial velocity plots that conform to a sequential mechanism. Linear noncompetitive product inhibition patterns were observed with respect to either substrate, indicating the formation of a dead end complex. 4-Isopropyl catechol, a structural analogue of the organic substrate, inh...

Synthesis, Reactions and Antioxidant Activity of 5-(3', 4'-dihydroxy-tetrahydrofuran-2'-yl)-2-methyl-3-carbohydrazide

In this manuscript, we describe the synthesis of the carbohydrazide 2. Acid-catalyzed condensation with several carbonyl compounds to afford the corresponding carbohydrazide derivatives 3-12. Their acetylation afforded the corresponding acetyl derivatives 13-22. Oxidative cyclization of O-acetyl derivatives 19-22 afforded the corresponding 1,3,4-oxadiazole derivatives 23-2...

Methyl 2 , 5 - Dihydroxy - 4 - ( 3 1 - methyl - 2 1 - butenyl ) benzoate

Methyl 2,5-dihydroxy-4-(31-methyl-21-butenyl)benzoate (1) was isolated from the root of Erythrina subumbrans. The chemical structure of 1 has been elucidated based on spectroscopy UV-Vis, HRESIMS, 1D and 2D NMR analysis.

Foreword Introduction 4 , 5 - Dihydroxy - 1 , 3 - Bis ( Hydroxymethyl ) Imidazolidin - 2 - One Cas N ° : 1854 - 26 - 8