CH3CH216
CH3CH216 refers to a chemical compound. The CH3CH2 group represents an ethyl functional group. The "16" likely denotes a specific positional isomer or a part of a larger molecular formula that has not been fully specified. Without further context, it is difficult to definitively identify the compound. It is possible that "16" refers to a substituent at the 16th position of a parent chain or ring, or it might indicate a specific isotope or a component within a complex mixture.
If "CH3CH216" is intended to be a simplified representation of a specific chemical substance, additional information