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Report a problem related to object: Wpływ struktury cząsteczkowej na własności optyczne układów z węglowymi centrami chiralnoścu. 15, O niektórych pochodnych kwasów 9-metylo-, 9-etyli- i 9-propylo-fluorenokarboksylowych-2 = Vliânie molekulârnoj struktury na optičeskie svojstva sistem s uglerodnymicentrami asimmetrii. XV. Nekotorye proizvodnye 9-metilo-, 9-ètilo i 9-propilo-fluorenokarboksilovyh kislot = Influence of structure on the optical properties of compounds with carbonic chirality centres. About some derivatives of 9-methyl-, 9-ethyl-, and 9-propyl-2-fluorene carboxylic acids /