934 



SUBJECT INDEX 



Elimination maxima (continued) : 



of vitamin A esters, 727 

 Elodea, lutein epoxide in, 561 

 Eloxanthin, 569 (see also Lutein epoxide) 

 Enanthyl chloride (see Heptanoyl chlo- 

 ride ) 

 Enantiotrophism, 94 

 Energy requirement for production of 



vitamin D, 761 

 English elm bark wax, 379 

 English ivy seed oil, composition, 202 

 Epicholesterol, stereoisomeric relations, 



339 

 Epi-compounds, conversion to normal- 

 series, 340 



definition, 337 

 Epicoprosterol, from coprostanone, 341 



from coprosterol, 341 



stereoisomeric relations, 339 

 Epi-7-dehydrocholesterol, activated, bio- 

 potency, 781 



melting point, 749 



provitamin D activity, 744 



specific rotation, 749 



synthesis, 758, 759 

 Epididymis, rat, tocopherols in, 799 

 Epidihydrocholesterol, from cholesta- 

 none, 341 



from dihydrocholesterol, 341 



stereoisomeric relations, 339 

 Epi-ergosterol, provitamin D activity, 

 744 



synthesis, 758 

 Epimerization, of cholestanone, 341 



of coprostanone, 341 

 Epiphasic behavior, 619 

 Episterol in yeast, 361 

 Epoxides, antheraxanthin, 564, 565 



capsanthin, 579 



carotene, 508 



a-carotene mono-, 536, 537 



/3-carotene mono-, 526 



^-carotene di-, 526, 527 



cryptoxanthin mono-, 551 



cryptoflavin di-, 552 



lutein, 559-561 



violaxanthin, 566, 567 



vitamin A, 709, 710 



zeaxanthin mono-, 564, 565 



zeaxanthin di-, 566 

 Equilibrium constant and esterification, 

 114, 115 



Ergostadione, 753 



Ergostane, nor-allocholanic acid from, 



751 

 Ergostane-3,5,6-triol, pyridazine of, 754 

 Ergostanol, 751, 752 

 Ergostenedione, 753 

 Ergosterol, absorption maxima, 748 



as impurity in cholesterol, 326 



as precursor of vitamin D, 355 



as provitamin Da, 742, 745 



irradiation, effect on, 359 



isolation, 355 



isoprocalciferol and, 788 



melting point, 749 



molecular extinction curve, 750 



occurrence, 355-358, 745, 746 



ozone reaction on, 751, 753 



properties, 358, 359 



specific rotation, 749 



structure, 358, 750-754 

 Ergosterol-22-oxide, provitamin D ac- 

 tivity, 744 



synthesis, 758 

 Ergosterj^l acetate, constants, 359 

 Ergosteryl allophanate, constants, 359 

 Ergosteryl benzoate, constants, 359 

 Ergosteryl palmitate, constants, 359 

 Eriolin, 511 



Erucamide, melting point, 139 

 Erucic acid, boihng point, 109 



content in fats, 196, 201-204 



deposition in dog fat, 235 



discovery, 15 



in jojoba oil, 383 



occurrence, 17 



oxidation, 158 



parachor, 106 



physical constants, 46 



solubility, 66-68 



specific gravity, 100 



surface tension, 106 

 Erucic anhydride, melting point, 135 

 Erucyl alcohol, boiling point, 310 



in jojoba oil, 312, 383 



melting point, 310 



synthesis, 315 

 Erythrodiol, as monostearate, 384 



interconversions, 388, 389 

 Erythrophyll, 512 

 Eschscholtziaxanthin, 586 



absorption spectra, 610 



properties, 604 



