"' Ethylidene diacetate "'is an organic compound with the formula ( CH 3 CO 2 ) 2 CHCH 3.
2.
It is also formed by the action of alcoholic potash and methyl iodide on ethylidene diethyl sulfine, CH 3 " CH ( SO 2 C 2 H 5 ) 2 ( which is formed by the oxidation of dithioacetal with potassium permanganate ).
3.
Further chemical modifications led to the well-known thenylidene derivative VM-26 ( teniposide, VumonR, discovered in October 1965, commercialized by Sandoz in 1976 ) and to the clinically still very successful ethylidene derivative VP-16-213 ( etoposide, VepesidR, discovered on October 21, 1966 ).
4.
Further chemical modifications led to the well-known thenylidene derivative VM-26 ( teniposide, Vumon, discovered in October 1965, commercialized by Sandoz in 1976 ) and to the ethylidene derivative VP-16-213 ( etoposide, Vepesid, discovered on October 21, 1966 ), which remains very clinically successful.
5.
Dienes currently used in the manufacture of EPDM rubbers are dicyclopentadiene ( DCPD ), ethylidene norbornene ( ENB ), and vinyl norbornene ( VNB ) . "'EPDM rubber "'is closely related to ethylene propylene rubber : ethylene propylene rubber is a copolymer of ethylene and propylene, whereas "'EPDM rubber "'is a terpolymer of ethylene, propylene, and a diene-component.
6.
While a total of 60 trace contaminants were eventually identified, only 6 of them were associated with EMS . The compound EBT ( 1, 1'- ethylidene-bis-L-tryptophan, also known as " Peak E " ) was the only contaminant identifiable by initial analysis, but further analysis revealed PAA ( 3-( phenylamino )-L-alanine, also known as " UV-5 " ), and peak 200 ( 2 [ 3-indolyl-methyl ]-L-tryptophan ).
मोबाइल