Question

Помогите
Найди родственников
CH3COOH; CH3- 0- CH3;
H2CO; CH3-OH;
C6H12; C5H12;
C2H4; CH2= CH- CH3;
CH3-CH= CH-CH3;
C2H2; CH=CH;
C2H5OH; CH3-COH; HCOOH;
CH3-COOC2H5.
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