SUBJECT INDEX 



931 



166 



167 



Diglycerides, acetyl value for determina- 

 tion, 247 

 melting point, 264, 265 

 polymorphism in, 263-266 

 structure, 265 

 1,2-Diglycerides, definition, 

 melting point, 266 

 polymorphism, 266 

 solubility, 269, 270 

 synthesis, 171, 172 

 1 .3-Diglycerides, definition, 

 melting point, 264, 265 

 polymorphism, 263-266 

 solubility, 269, 270 

 synthesis, 170, 171 / 

 Di-o-hexenylphenolr vitamin E biopo- 



tency, 825 --^ 



5,6-Dihydro-a-earotene, 539 

 5,6-Dihydro-/3-carotene, 533 

 Dihydro-/3-carotenone, 530 

 Dihydrocholesterol, as impurity in chol- 

 esterol, 326 

 distribution, 343. 344 

 from cholestanone, 341 

 from cholesterol, 333, 343 

 from epidihydrocholesterol, 341 

 in wool fat, 370 

 properties, 344 



relation to epidihydrocholesterol. 339 

 stereoisomeric relations, 339 

 Dihydrocoumarin, vitamin E biopotency, 



824 

 Dihydroergosterol, 359, 360 

 22-Dihydroergosterol, as provitamin D4, 

 742 

 melting point, 749 

 specific rotation, 749 

 structure, 755 

 synthesis, 756 

 2 - ( /3,7 - Dihydrophy tyl) - 1 ,4-naph thoquin- 



none, vitamin K biopotency, 847 

 Dihydropsychosin, 491 

 Dihydrorhodoxanthin, 574 

 absorption spectra, 610 

 properties, 604 

 Dihydrositosterol, 355 

 Dihydrosphingosine from Cysticerciis, 

 439, 464 

 preparation, 464 

 Dihydrosphingosinebromide, 462 

 Dihydrosphingosinepicrate, 462 

 22-Dihydrostigmasterol in sugar-cane 

 wax, 377 



Dihydrotachysterol (see A.T.10) 

 5,8-Dihydrovitamin Ki, biopotencj^ 856, 



857 

 Dihydrovitamin Ki diacetate, 835 



synthesis, 839-841 

 Dihj'droxybehenic acid from erucic acid, 



158 

 11,12-Dihydroxyeicosenoic acid, 383 

 9,10-Dihydroxyoctadecanoic acid (see 



Dihydroxystearic acid) 

 Dihydroxystearic acid, discovery, 28 

 from oleic acid, 158, 161 

 physical constants, 48 

 structure, 30 

 3,11-Dihydroxytetradecanoic acid (see 



Ipurolic acid) 

 Dihydroxyundecanoic acid from undece- 



noic acid, 158 

 Dika fat, "association ratio" of fatty 



acids in, 218, 220 

 Dilation of fatty acids, 102, 103 

 1,2-Dilaurin, optical activitj^ 273 

 1,3-Dilaurin, melting points, 264 

 1,3-Dilinolein, constants for, 264 

 1,3-Dilinolenin, constants for, 264 

 1,3-Dimargarin, melting points, 264 

 Dimethylaminovitamin A, in vitamin A 



synthesis, 720 

 l.l-Dimethyl-3-<e7-^butyl-l,4-dihydro- 

 anthraquinone, vitamin K bio- 

 potency, 849 

 2.2-Dimethylchroman, vitamin E bio- 

 potency, 823 

 2,2-Dimethylchromene, vitamin E bio- 

 potency, 823 

 Dimethylcrocetin, absorption spectra, 644 

 possible stereoisomers, 627 

 structure, 651 

 2,2-Dimethyldodecanoic acid, 55 

 5,7-Dimethyl-8-ethy Itocol , biopotency, 



821 

 a,a-Dimethylglutaric acid, /3-carotene and, 



515 

 Dimethjdmaleic anhydride, from a-toco- 



pherol, 805, 807 

 Dimethylmalonic acid, from capsanthin, 

 576 

 from /3-carotene, 515 

 from fucoxanthin, 571 

 from lutein and zeaxanthin, 554 

 2.6-DimethylnaphthaIene from /3-caro- 

 tene. 516 



