precursor

in radioanalytical chemistry
https://doi.org/10.1351/goldbook.P04805
Of a @N04257@, any @R05077@ @N04257@ which precedes that @N04257@ in a @D01537@.
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2523 [Terms] [Paper]