FIELD: chemistry.
SUBSTANCE: invention relates to compounds of formula 
and 
in which R is selected from the group, consisting of 1-pentyl, 3-pentyl, 1-(2-methybutyl), 2-(2-methylbutyl), 2-(3-methylbutyl), 1-(3-methylbutyl) and 1-(2,2-dimethyl)propyl, and R' represents carbonyl group, substituted with hydrogen atom or linear or branched C1-C6-alkyl group, or linear or branched C2-C6-alkenyl group, on condition that R is not 1-pentyl in formula I. The invention also relates to method for obtaining said and intermediate compounds.
EFFECT: compounds can be used in perfumery and/or flavouring compositions as fragrant substances.
12 cl, 2 tbl, 12 ex
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