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18049-09-7

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18049-09-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18049-09-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,0,4 and 9 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 18049-09:
(7*1)+(6*8)+(5*0)+(4*4)+(3*9)+(2*0)+(1*9)=107
107 % 10 = 7
So 18049-09-7 is a valid CAS Registry Number.

18049-09-7Relevant articles and documents

Stereochemical Studies on Homoterpene Biosynthesis in Higher Plants; Mechanistic, Phylogenetic, and Ecological Aspects

Gaebler, Andreas,Boland, Wilhelm,Preiss, Ute,Simon, Helmut

, p. 1773 - 1789 (2007/10/02)

In higher plants, the two homoterpenes 4,8-dimethylnona-1,3,7-triene (1) and 4,8,12-trimethyltrideca-1,3,7,11-tetraene (2) originate from nerolidol (3) or geranyllinalool (4) by an oxidative cleavage of their C-skeletons.The reaction proceeds with exclusive loss of HS-C(5) of 3 and formal production of a C4 fragment.The site specificity of the enzyme(s) is identical for all of the hitherto examined plant families (Agavaceae, Asclepiadaceae, Asteraceae, Leguminosae, Magnoliaceae, and Saxifragaceae).The enzyme tolerates a wide range of structural modifications at the poalr head of 3.Instead of 3, also geranylacetone 12 and the secondary alcohol 13 can be cleaved to the homoterpene 1 and as yet unidentified carbonyl fragments.The C=C bonds within the aliphat/ic chain of 3 seem to be essential for the oxidative bond cleavage as well as for recognition and embedding of the substrate into the active center of the enzyme(s).The feed-induced biosynthesis of 1 and 2 in leaves of the Lima bean Phaseolus lunatus infested with the spider mite Tetranychus urticae probably requires a preceding release of nerolidol (3) or geranyllinalool (4) from phytogenic glycosides prior to the fragmentation reaction.The microbial reduction of the trienoic acids 6 and 6a is the key step for the synthesis of deuterium labelled nerolidol (3RS,5R)- and (3RS,5S)-9.

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