2i6 CAROTENOIDS CONTAINING HYDROXYL GROUPS XI 



64. R. KuHN and H. Brockmann, Z. physiol. Chem. 206 (1932) 61. 



65. L. Zechmeister and co-workers, Biochem. J. 32 (1938) 1305; Ber. y2 (1939) 1340, 

 1678; /. Am. Chem. Soc. 66 (1944) 317. 



66. L. Zechmeister and R. M. Lemmon, /. Am. Chem. Soc. 66 (1944) 317. 



67. P. Karrer and E. Jucker, Helv. chim. Acta 28 (1945) 300. 



68. P. Karrer and J. Rutschmann, Helv. chim.. Acta 2j (1944) 1684. 



69. P. Karrer and E. Jucker, Helv. chim. Acta 28 (1945) 300. 



70. P. Karrer and J. Rutschmann, Helv. chim. Acta 2y (1944) 1684. — P. Karrer and 

 E. Jucker, Helv. chim. Acta 28 (1945) 300. 



71. P. Karrer and A. Oswald, Helv. chim. Acta 18 (1935) 1303. 



72. P. Karrer and E. Jucker, Helv. chim. Acta 28 (1945) 300. 

 72a. G. Tappi and P. Karrer, Helv. Chim. Acta 32 (1949) 50. 



73. R. KuHN and A. Winterstein, Ber. 64 (1931) 326. 



74. P. Karrer and co-workers, Helv. chim. Acta 14 (1931) 1044; 16 (1933) 977; 19 (1936) 

 1024; 27 (1944) 1684. 



75. P. Karrer and E. Jucker, Helv. chim. Acta 28 (1945) 300. 



76. R. KuHN and A. Winterstein, Ber. 64 (1931) 326. 



77. P. Karrer and E. Jucker, Helv. chim. Acta 28 (1945) 300. 



78. P. Karrer and E. Jucker, Helv. chim. Acta 28 (1945) 300. 



79. R. KuHN and A. Winterstein, Ber. 64 (1931) 326. 



80. P. Karrer and R. More, Helv. chim. Acta 14 (1931) 1045. 



81. P. Karrer and co-workers, Helv. chim. Acta ig (1936) 1024; Helv. chim. Acta2y (1944) 

 1684. 



82. P. Karrer and J. Rutschmann, Helv. chim. Acta 2y (1944) 1684. 



83. K. W. Hausser and A. Smakula, Z. angew. Chem. 4y (1934) 663; 48 (1935) 152; 

 K. W. Hausser, Z. techn. Phys. 15 (1934) i3- 



84. P. Karrer and J. Rutschmann, Helv. chim. Acta 2y (1944) 1684. — P. Karrer and 

 E. Jucker, Helv. chim. Acta 28 (1945) 300. 



85. P. Karrer and U. Solmssen, Helv. chim. Acta ig (1936) 1024. — R. Kuhn and A. 

 Winterstein, Ber. 64 (1931) 332. 



86. P. Karrer and J. Rutschmann, Helv. chim. Acta 2y (1944) 1684. 



87. P. Karrer and J. Rutschmann, Helv. chim. Acta 25 (1942) 1624. 



88. P. Karrer and J. Rutschmann, Helv. chim. Acta 2$ (1942) 1624. 



89. P. Karrer and E. Jucker, Helv. chim. Acta 28 (1945) 300. 



90. P. Karrer and J. Rutschmann, Helv. chim. Acta 25 (1942) 1624; 27 (1944) S^o- 



91. P. Karrer and J. Rutschmann, Helv. chim. Acta 2y (1944) 1684. 



92. P. Karrer and E. Jucker, Helv. chim. Acta 28 (1945) 300. 



93. P. Karrer, E. Jucker and J. Rutschmann, Helv. chim. Acta 28 (1945) 1156. 



94. J. J. Berzelius, Ann. 21 (1837) 261. 



95. R. Willstatter and W. Mieg, Ann. 355 (1907) i. 



96. R. Willstatter and H. H. Escher, Z. physiol. Chem. y6 (1912) 214. 



97. P. Karrer and co-workers, Helv. chim. Acta 13 (1930) 268, 1094; 14 (1931) 614, 843; 



■r<5 (1933) 977- 



98. R. Willstatter and A. Stoll, Untersuchungen iiber Chlorophyll, Julius Springer, 

 Berlin 1913; P. Karrer and co-workers, Helv. chim. Acta 14 (1931) 614; R. Kuhn and 

 H. Brockmann, Z. physiol. Chem. 206 (1932) 41; R. Kuhn and A. Winterstein, 

 Naturwissenschaften 18 (1930) 754. 



99. H. Junge, Z. physiol. Chem. 268 (1941) 179. 



100. R. Kuhn, A. Winterstein and E. Lederer, Z. physiol. Chem. igy (1931) 153. — 



P. Karrer and co-workers, Helv. chim. Acta 14 (1931) 625. 

 loi. R. Kuhn, A. Winterstein and E. Lederer, Z. physiol. Chem. igy (1931) 153. 



102. E. S. Miller, Chem. Centr. ig35, I, 3545. 



103. L. Zechmeister and P. Tuzson, Ber. 63 (1930) 3203; Ber. 6y (1934) I7°- 



104. P. Karrer and co-workers, Helv. chim. Acta 13 (1930) 268, 1084; 14 (1931) 614, 

 843; 16 (1933) 977. 



