342 CAROTENOIDS OF UNCERTAIN STRUCTURE XIV 



37. R. ^ETovsKY, Collection of Czechoslovak, chem. Communications 13 (1948) 631. 



38. P. Karrer and co-workers, Helv. chim. Acta 14 (1931) 628. 



39. R. WiLLSTATTER and H. J. Page, Ann. 404 (1914) 253. 



40. I. M. Heilbron and R. F. Phipers, Biochem.J. 29 (1935) 1369- 



41. P. Karrer and co-workers, Helv. chim. Acta 14 {1931) 623. 



42. H. V. EuLER, P. Karrer, E. Klussmann and R. More, Helv. chim. Acta 15 (1932) 502. 



43. M. TswETT, Ber. dtsch. hot. Ges. 24 (1906) 234. — I. M. Heilbron and R. F. Phipers, 

 Biochem. J . 2g (1935) i373- 



44. H. H. Strain, W. M. Manning, /. Am. Chem. Sac. 64 (1942) 1235. 



45. H. H. Strain, W. M. Manning, G. Hardin, Biochem. Bull. 86 (1944)- — /• biol. Chem. 



148 (1943) 655. 



46. K. ScHON, Biochem. J. 32 (1938) 1566. 



47. L. Zechmeister and W. A. Schroeder, /. Am. Chem. Soc. 65 (1943) i535- 



48. A. L. Le Rosen and L. Zechmeister, Arch. Biochem. i (1943) 17. 



49. G. MiCHAUD and J. F. Tristan, Arch. Sci. phys. nat. Geneve 37 (1914) 47- 



50. L. Zechmeister, T. B^res and E. Ujhelyi, Ber. 69 (1936) 573- — Cf. also Ber. 68 

 (1935) 1321. 



51. H. Suginome and K. Ueno, Bull. Soc. chem. Jap. 6 (1931) 221. 



52. L. Zechmeister and co-workers, Ber. 69 (1936) 573- 



53. E. Chargaff and J. Dieryck, Naturwissenschaften 20 (1932) 872. 



54. E. Chargaff, Compt. rend. 197 (i933) 94^- 



55. T. Nakamura, Bull. chem. Soc. Japan 11 (1936) 176- 



56. Yoshiharu Takeda and Tatuo Ohta, Z. physiol. Chem. 268 (1941) I-H- 



57. R. Kuhn and E. Lederer, Z. physiol. Chem. 200 (1931) 108. 



58. P. Karrer and J. Rutschmann, Helv. chim. Acta 25 (1942) ii44- 



59. R. Kuhn and E. Lederer, Z. physiol. Chem. 213 (1932) 188. 



60. K. Schon, Biochem. J. 30 (1936) i960. 



61. R. Kuhn and H. Brockmann, Z. physiol. Chem. 206 (1932) 41- 



62. L. Zechmeister and P. Tuzson, Ber. 72 (1939) 1340- 



63. H. H. Strain, /. hiol. Chem. 123 (1938) 425. 



64. Cf. W. Franke, Z. physiol. Chem. 212 (1932) 234. 



65. E. Lederer, Recherches sur les Carotenoides des Animaux, These, Paris, 1938, p. 40. 



66. R. Lederer, Compt. rend. Soc. Biol. 116 (1934) 15°: ^^7 (i934) 4ii- 



67. E. Lederer, Compt. rend. 201 (1934) 3°°: These, Paris 1938. 



68. I. M. Heilbron, H. Jackson and R. N. Jones, Biochem. J. 29 {1935) 1384- 



69. E. Lederer, Compt. rend. Soc. Biol. 113 (i933) i39i- 



70. R. Fabre and E. Lederer, Bull. Soc. Chim. Biol. 16 (1934) io5- 



71. E. Lederer, These, Paris 1938, p. 27. 



72. E. Lederer, Compt. rend. Soc. Biol. 116 (1934) ^5°'> ^^7 (i934) 1086. 



73. P. Karrer and U. Solmssen, Helv. chim. Acta 18 (1935) 9i5- 



74. E. Lederer, Compt. rend. 197 (1933) 1694; Compt. rend. Soc. Biol. 117, 1083; These, 

 Paris 1938, p. 66; Bull. Soc. Chim. Biol. 20 (1938) 554- 



75. Cf. H. Fink and E. Zenger, Wschr. Brauerei 51 (1934) 89- 



76. P. Karrer and J. Rutschmann, Helv. chim. Acta 29 (1946) 355. 



77. C. Fromageot, Jou6 Leon Tchang, Arch. Mikrobiol. 2 (1938) 424. 



78. E. Lederer, These, Paris 1938, p. 68. 



79. E. Lederer, Compt. rend. 197 (1933) 1694. 



80. H. Fink and E. Zenger, Wschr. Brauerei, 51 (1934) 89. 



81. P. Karrer and J. Rutschmann, Helv. chim. Acta 26 (1943) 2109; 28 {i945) 795; 

 29 (1946) 355. 



82. J. Rutschmann, Dissertation, Ziirich, 1946. 



83. A. Winterstein, Z. physiol. Chem. 219 (1933) 249. 



84. Carmela Manunta, Helv. chim. Acta 22 (1939) 1153. 



85. P. Karrer and J. Rutschmann, Helv. chim. Acta 27 (1944) 1691. 



86. P. Karrer and E. Jucker, Helv. chim. Acta 29 (1946) 1539- 



