EXPLICIT FORMULAS FOR MQ-FILTERED COSY OF AN ARBITRARY NUMBER OF MAGNETICALLY EQUIVALENT SETS OF SPIN-1 2 NUCLEI/

Expressions for the density matrix and the observable spectra are expl icitly presented for multiple quantum (MQ) filtered correlation spectr oscopy pertaining to weakly coupled spin-1/2 nuclei. A feature of most general nature is preserved throughout the calculations, namely arbit rary number of magnetically equivalent sets, with no restriction on th e number of spins contained in a given set. The equations have been en coded in a modular fashion into the code PQFCOSY in Fortran language f or ease of computation.