The condensed structural formula is used to save Space, structural formulas are conveniently abbreviated as condensed structural formula. This is a system for writing organic compounds in a single line. It’s a method that use a sort of shorthand notation to convey more information than a chemical formula. Condensed structural formula (CSF) is a language-based method of expressing molecules.
e.g.
CH3CH2CH3 CH3CH3 CH3CH₂CH₂CH2CH3
Propane Ethane Pentane
CH3CH2OH CH3(CH2)3CH3 CH3CH2CH(OH)CH2CH2CH3
Ethanol Pentane Hexan-3-ol