CH3CH3CH3-CH-CH2-CH-cн,-cu-cu-cu, -, -снэ1СН3н. -1CH3-CHсн3-снгD..

CH3CH3CH3-CH-CH2-CH-cн,-cu-cu-cu, -, -снэ1СН3н. -1CH3-CHсн3-снгD..