Not sure if this the most efficient, but it worked for me. Preladon
Note that the 18 on the Gz combines well with the -17 on the Pz. Therefore we're looking for a way to change the -4 on the Gs to something to bond to Gu. Then we add the tinctures in the right order and create the compound we're looking for.
Notice that the -9 bonds nicely with the 9 on the Gs, and the 4 bonds with the -4 on the Gs.
SIDE NOTE it is possible once reaching 1 tincture and the 2 numbers you need to add your tinctures in the wrong order, they DO NOT by default go into alphabetical order, i have not yet determined what causes them to be out of order, however in the example above at the end if i had added Qr 1st it would have been placed on the Left side of Ib - Tactician
Examples of specific tinctures are IMO pointless, there are well over 100,000 combinations it could ask for so here is the basic rules, and one example, you should be able to figure it all out from there. - Tactician