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Dybiec Cz. Eddy current method for defecting intercrystalline corrossion Materials XXIII KKBN, Szczyrk 1994. 

XXIII xxin, 1st 1936 3458-3554 Two Cyclic Nitrogens. Stem nuclei Piperazine, 4. Diazo-... 

H. V. Klapdor, Proceedings of the XXIII Yamada Conference on Nuclear Weak Process and Nuclear Structure, Osaka, Japan, Max Planck Institute fur Kernphysics, Heidelberg, Germany, 1989. 

The United States Pharmacopeia XXIII(USP XXIII-NF XVIII), United States Pharmacopeial Convention, Inc., Rockville, Md., 1995. 

The standard chemical and biological methods of analysis are those accepted by the JnitedStates Pharmacopeia XXIII as well as the ones accepted by the AO AC in 1995 (81—84). The USP method involves saponification of the sample (dry concentrate, premix, powder, capsule, tablet, or aqueous suspension) with aqueous alcohoHc KOH solvent extraction solvent removal chromatographic separation of vitamin D from extraneous ingredients and colormetric deterrnination with antimony trichloride and comparison with a solution of USP cholecalciferol reference standard. 

The United States Pharmacopeia XXIII (USP XXIII-NF XVHI), The United States Pharmacopeia Convention, Inc., Rockville, Md., 1995, p. 1631. Pood and Nutrition Board, National Research Council, Food Chemicals Codex, 3rd ed.. National Academy Press, Washiagton, D.C., 1981, p. 330. K. Helrich, ed.. Official Methods of Analysis of the Association of Off dal Analytical Chemists, 15th ed.. Association of Official Analytical Chemists, Inc., Arlington, Va., 1990, pp. 1070—1079. 

Ramaswamy, R., Vacuum circuit breakers, Siemens Circuit, XXIII, April (1988). 

XXIII) would imply that dihydro-0-conhydrinemethine is an addition product of w-octaldehyde and dimethylamine and, as such, would be unstable to acids. Spath et al., therefore, selected 5 as the position of choice and represent 0-conhydrine as 5-hydroxy-2-propylpiperidine... 

Lobinanidine is oxidised by chromic acid at 70-80° to lobinanine (XXIII). On more vigorous oxidation by this reagent benzoic acid is formed and also lobininic acid, CgIIj304N, identical with that obtained from lobinine. On hydrogenation it furnishes a-lelobanidine, which closely resembles the -lelobanidine from lobinine (see Table C), but is not identical with it. 

Blount and Robinson have extended this mode of synthesis to the preparation of iV-methyl/iomogranatonine (XXII) by the use of adipaldehyde, CHO. [CH2]4. CHO. The base, on reduetion with sodium in butyl aleohol, yields A -methyl/mmogranatoline (XXII CO — CHOH), the benzoyl derivative of which possesses marked local anaesthetic aetion. Similarly Blount, by eondensing /3-(o-formylphenyl)propaldehyde, CHO. CgH4. CHj. CHj. CHO, with methylamine and calcium acetonedicarboxylate, has prepared 8 9-benz-d - -feomogranatene-3-one (XXIII), which was reduced to the -alcohol (cf. reduction of tropinone to -tropine) and the latter converted to the benzoyl-derivative (m.p. 98°),... 

Papaverine was condensed with formaldehyde to methylenepapaverine (XXII), which on successive catalytic and electrolytic hydrogenation yielded two dZ-methyltetrahydropapaverines (XXIII), which on successive demethylation, condensation with formaldehyde and re-methylation yielded a mixture of bases, from which the two optically inactive corydalines (XXIV), jwesocorydaline, m.p. 163-4° (nac.), and dZ-corydaline, m.p. 132-3°, identical with the products obtained by the hydrogenation of dehydrocorydaline were isolated. For the conversion of corycavine to corydaline, see p. 304. 

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