each is hydrogen or alkyl, or R5 and R6 together with the adjacent pyridazine ring form phthalazinyl, and wherein X is oxygen or -NHCO-, -NHCO-A1- or -NHCO-A1-O- wherein A1 is alkylene, acid-addition salts thereof, processes for their manufacture and pharmaceutical composition containi...
1.1 Name Nitrogen,mixedwithoxygen 1.2 CAS No. 70356-02-4 1.3 CID 114954 1.4 Molecular Formula N2O2 1.5 Inchi InChI=1S/N2.O2/c2*1-2 1.6 InChkey DOTMOQHOJINYBL-UHFFFAOYSA-N 1.7 Canonical Smiles O=O.N#N 1.8 Isomers Smiles N#N.O=O...
Poly-sulphonyloxyurethanes of the formula ##EQU1## WHEREIN A is a linking group to which the oxygen atoms are attached at alkyl, cycloalkyl or aryl carbon atoms, n is an integer of value at least 2, and each R which may be the same or different, is an optionally substituted alkyl ...
L represents a group represented by (a) C1-6 alkylene group, (b) c2-6 alkenylene group, (c) c2-6 alkynylene group or formula e-g--, which may have a single bond and a substituent. In the equation, e may be an oxygen atom, a sulfur atom, an equation co -, - so -, - SO...
Native Alkaloids.—These may be divided into (1) bodies consisting of carbon, nitrogen, and hydrogen only, generally volatile liquids (of which nicotine may be quoted as an example); and (2) such as contain oxygen in addition to the three elements named (quinine, morphia, strychnine, &c)...
Claimed are nitrogen-containing alkoxysilanes of the formula in which R is an alkyl group having 1 to 3 carbon atoms, n = 0, 1 or 2 and m = 1, 2 or 3, and the process for preparation of said nitrogen-containing alkoxysilanes, which is characterized in that an in an inert solvent ...
(t is 3 or 4> Z is oxygen and n is 0, 1 or 2 and a) if R<11> is H and R<9>-R<10> and R<7>-R<8> form chemical bonds then R<4> is H or phenyl, YR<5>R<6> represents oxygen or Y represents nitrogen and R<5> is alkyl optionally substituted by hydroxy, carboxy ...
Oxygen The development of a detector specific to oxygen (O-FID) has met the need for the measurement of oxygenated compounds such as methylt-butyl ether in commercial gasolines. Several methods have been standardized (EN 1601-96, ASTM D5599-93). Due to its low sample capacity, this de...
specific gas in the air will “boil” off. (Note: Oxygen, argon,carbon dioxide, and nitrogen all have specific boiling points and these gases can be used tocollect the specific gas during the fractionation process.) When the temperature –reaches–195.8°C, the nitrogen is boiled off and ...
2 independently stand for an alkyl group of 1 to 5 carbon atoms, provided that Rf.sub.1 and Rf.sub.2 are joined to each other in one of the three patterns of union, 1) direct union, 2) union through the medium of an oxygen atom or 3) union through the medium of a nitrogen ...