condensed formula

https://doi.org/10.1351/goldbook.08158

Linear representation of the structure of a molecular entity in which bonds are omitted.

Example: Methyl 3-methylbutyl ether (isoamyl methyl ether, \(\ce{(CH3)2CHCH2CH2OCH3}\), sometimes condensed further to \(\ce{(CH3)2CH[CH2]2OCH3}\).

Note: This term is sometimes also called a line formula, because it can be written on a single line, but the line formula explicitly shows all bonds.

Source:
PAC, 2022, 94, 353. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)' on page 389 (https://doi.org/10.1515/pac-2018-1010)