1. Abati, G.: Gazz. chim. ital. 40, 2, 91 (1910). — 2. Adams, R.: J. Amer. Chem. Soc. 41,260 (1919). — 3. Adler, E., and L. Ellmer: Acta chem. scand. 2,839 (1948). — 4. Albers, C. C.: Pharm. Arch. 13, 39 (1942), — 5. Albright, A. R.: J. Amer. Chem. Soc. 36, 2198 (1914). — 6. Alder, K., F. Pascher and H. Vogt: Ber. dtsch. chem. Ges. 75,1514 (1942). — 7. Allen, C. F. H.: J. Amer. Chem. Soc. 52, 2955 (1930). — 8. Allen, C. F. H., and J. W. GatesJr.: J. Org. Chem. 6, 599 (1941). — 9. Allen, C. F. H., and J. H. Richmond: J. Org. Chem. 2, 224 (1937). — 10. Altschul, M., and B. v. Schneider: Z. physik. Chem. 16, 24 (1895). —11. Ashworth, F., and G. N. Burkhardt: J. Chem. Soc. 1928,1798. —12. Auwers, K. V.: Liebigs Ann. 408, 245 (1915).
2. 2. Bacon, E. F.: Phillipine J. Sci. 4,93 (1911)
3. 3. Chem. Zbl. 1911 I,147. - 14. Baker, W., E. H. T. Jukes and J. Subrahmanyam: J. Chem. Soc. 1984, 1682. - 15. Baker, W., A. R. Penfold and J. L. Simonsen: J. Chem. Soc. 1939,441. - 16. Baker, W., and R. I. Savage: J. Chem. Soc. 1938, 1607. - 17. Bamberger, M.: Monatshefte f??r Chemie 12, 444 (1891). - 18. Bamberger, M.: Monatshefte f??r Chemie 18, 502 (1897). - 19. Bargellini, G.: Gazz. chim. ital. 53, 238 (1923). - 20. Baril, O. L., and G. H. Megrdichian: J. Amer. Chem. Soc. 58, 1415 (1936). - 21. Barth, L., and H. Hlasiwetz: Liebigs Ann. 138, 61 (1866). - 22. Bert, L.: Compt. rend. Acad Sci. (Paris) 177, 453 (1923). - 23. Bert, L.: Bull. Soc. Chim. [4], 87, 1251 (1925). - 24. Bert, L.: Bull. Soc. Chim. [4], 87,1577 (1925). -25. Berta-Gnini, C.: Liebigs Ann. 85,271 (1853). - 26. Bertram, J., and E. Gildemeister: J. prakt. Chem. 2, 89, 349 (1889). - 27. Bertram, J., and R. K??rsten: J. prakt. Chem. 2, 51, 316 (1895). - 28. Bickel, V. T., and H. E. French: J. Amer. Chem. Soc. 48, 749 (1926). - 29. Bignami, C., and G. Testoni: Gazz. chim. ital. 801,246 (1900). - 30. Birkinshaw, J. H., and W. P. K. Findlay: Biochem. J. 34, 82 (1940). - 31. Black, R. A., A. A. Rosen and S. L. Adams: J. Amer. Chem. Soc. 75, 5344 (1953). - 32. Blanchet, and Sell: Liebigs Ann. 6, 297 (1833). - 33. Block, H.: Z. physik. Chem. 78, 397 (1911). - 34. Blyth, J., and A. W. Hofmann: Liebigs Ann. 53, 289 (1845). - 35. Boedecker, F., and A. Volk: Ber. dtsch. chem Ges. 64,62 (1931). - 36. B??hme, E.: Ber. dtsch. chem. Ges. 70,379 (1937). - 37. Bost, R. W., and F. Nicholson: J. Amer. Chem. Soc. 57, 2369 (1935). - 38. Bruckner, V.: Ber. dtsch, chem. Ges. 95,2041 (1942). - 39. Br??hl, J. W.: Liebigs Ann. 235,17 (1886). - 40. Br??hl, J. W.: Liebigs Ann. 200, 139 (1879). - 41. Br??hl, J. W.: J. prakt. Chem. 2, 50,131 (1894). - 42. Br??hl, J. W.: Ber. dtsch. chem. Ges. 29, 2907 (1896).
4. Campbell, J.: Analyst 61, 392 (1936). — 44. Carre, P., and D. Liebermann: Compt. rend. Acad. Sci. (Paris) 198, 274 (1934). — 45. Ciamician, G., and P. Silber: Ber. dtsch. chem. Ges. 21, 1621 (1888). — 46. Claus, A., and W. Fahrion: J. prakt. Chem. 2, 39, 360 (1889). — 47. Cope, A. C.: J. Amer. Chem. Soc. 57, 574 (1935).
5. 5. Daufresne, M.: Compt. rend. Acad. Sci. (Paris) 145, 875 (1907). - 48a. Davis, B.D.: J. Biol. Chem. 191,315 (1951). - 48b. De Busk, A. G., and R. P. Wagner: J. Amer Chem. Soc. 75, 5131 (1953). - 49. Del??Pine, M., and A. Longuet: Bull. Soc. Chim. biol. (Paris) 4, 39,1022 (1926).-50. Derick, C.G., and J. H. Bornmann: J.Amer. Chem. Soc. 35,1287 (1913).- 51. Diels, O., and H. Heintzel: Ber. dtsch chem. Ges. 38,302 (1905). - 52. Dippy, J. F. J., and R. H. Lewis: J. Chem. Soc. 1937,1010. - 53. Dollfus, W.: Ber. dtsch. chem Ges. 26,1971 (1893).-54. Dunstan, R. W., and T. A. Henry: J. Chem. Soc. 75,66 (1899). - 55. Duquenois, P.: Bull. Soc. Chim. 5, biol (Paris) 5, 1200 (1938). - 56. Dzirkal, V.: Trans. Inst. Pure Chem. Reagents (U.S.S.R.) No. 17, 40 (1939)