Ledene

On dehydration it yields the sesquiterpene ledene, which has scarcely been investigated. 

The major compounds extracted from labdanum were dihydrocinnamic acid (39), which is not found in other resins or gum resins and the relatively uncommon aromadendr-1 -ene (51) and ledene (61). Three minor diterpenes are also characteristic [40]. 

Hydroderivatives of ledol, ledene and leddiene, Perfum. esscnt. Oil Rec. 

The thermod5mamic characteristics described above have been deduced mainly from data relating to the first complex formed within the various systems considered (/, 2), since complete data for all the consecutive steps have until recently been very scarce. From the few data available for the later steps it was however clear, that these would not have radically different characteristics from the first step within the respective system. It was nevertheless also dear that a more or less gradual change did occur. This was pointed out as early as 1964 by Leden 3) who also attempted to generalize the few results then available. A fairly large body of data has since accumulated and the time now seems ripe to reopen the discussion in the hope of arriving at a clearer and more detailed picture than was possible in 1964. 

Acknowledgement. I am most grateful to my friends Ido Leden and Gerald Schwarzen-hach lor the many fruitful discussions that we have had on the theme of this treatise. 

Leden, I. Potentiometrisk undersokning av n5,gra kadmiumsalters komplexitet (Diss.), University of Lund, 1943,... 

Globoid bodies (glycolipid-leden marophages) in white matter of brain... 

Figure 3.2 The Leden-Chatt triangle with copper at the apex. A useful way to remember some of the soft metal ions.

Chatt-Leden triangle 23)) in the periodic table, with the most pronounced class b behavior shown by elements in its center ... 

Leden I. Digoxin-hydroxychloroquine interaction Acta Med Scand 1982 211(5) 411-12. 

Leden I, Libelius R. Penicillamine-induced polymyositis. Scand J Rheumatol 1985 14(l) 90-3. 

The total neutral essential oil from M. oleifera leaves is composed of 44 constituents and include toluene, 5-ter/-butyl-l,3-cyclopentadiene, benzaldehyde, 5-methyl-2-furaldehyde, benzeneacetaldehyde, linaloloxide, 2-ethyl-3,6-dimethylpyrazine, undecane, a-isophorone, benzylnitrile, 2,6,6-trimethyl-2-cyclohexane-l, 4-dione, 2,2,4-trimethyl-pentadiol, 2,3 -epoxycarane, p-menth-1 -en-8-ol, 2,6,6-trimethylcyclohexa-1,3 -dienecarbaldehyde, indole, tridecane, a-ionone, l,l,6-trimethyl-l,2-dihydronaphthalene, a-ionene, (1-damascenone, 3-ionone, ledene oxide, 2-ter/-butyl-l,4-dimethoxybenzene, ( )-6,10-dimethylundeca-5,9-dien-2-one, 4,6-dimethyl-dodecane, 3,3,5,6-... 

D. Grin sirup, 1. Leden, Acta Chem. Scand. 1968, 22,1163. 

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