Enter the number of different ligands (building blocks) you want to allow:

Start the the computation using the start button, in due course you will obtain the total number of such permutational isomers (molecules in the library).

Enter the number of different ligands you want to allow:

Please start the the computation using the start button. You will in due course obtain the so-called group-reduction-function which is a sum of expressions like this 4 [0,0,2,3,0]. The given summand 4[0,0,2,3,0] means that there are exactly 4 permutational isomers (or molecules in the combinatorial library) that contain 2 ligands of the third and 3 ligands of the fourth kind (if you entered 5 as the intended number of ligands)