A linear octasaccharide (molar mass \( = 1024 \, g \, \text{mol}^{-1} \)) on complete hydrolysis produces three monosaccharides: ribose, 2-deoxyribose and glucose. The amount of 2-deoxyribose formed is \( 58.26\% \) (w/w) of the total amount of the monosaccharides produced in the hydrolyzed products. The number of ribose unit(s) present in one molecule of octasaccharide is __________.
Use: Molar mass (in \( g \, \text{mol}^{-1} \)): ribose \( = 150 \), 2-deoxyribose \( = 134 \), glucose \( = 180 \); Atomic mass (in amu): \( \text{H} = 1 \), \( \text{O} = 16 \).
