Question

formula 2, metil-3, etil-4, isopropil-decanal

Answer 1

                     CH2-CH3
₁           ₂      ₃Ι      ₄        ₅        ₆          ₇          ₈        ₉         ₁₀CHO - CH - CH - CH - CH2 - CH2 - CH2 - CH2 - CH2 - CH3            Ι                Ι            CH3         CH-CH3                             Ι                             CH3