FIELD: chemistry.
SUBSTANCE: invention relates to compounds of general formula 
where R1 and R2 represent hydrogen atom; R3 represents benzyl, substituted -O(C1-4alkyl); R5 represents methyl; R6 represents C1-6alkyl; R11 and R12 together form 5-membered heterocyclyldiyl of structure 
R19 and
R20 are independently selected from C1-6alkyl; R13 represents fragment 
; R16 represents NO2, R14, R15, R17, and R18 represent hydrogen atom.
EFFECT: compounds of formula (VII) as intermediate products for obtaining macrolides.
6 cl, 18 dwg; 3 ex
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