### Three molecules from a combinatorial library are given below: Finding a new drug typically requires at least 5000 failed compounds. Assuming that the substituents shown in the structures above can be used at any of the diversity sites, what is the minimum number of ADDITIONAL substituents you would need to use in order to give a good probability of finding a

Three molecules from a combinatorial library are given below: Finding a new drug typically requires at least 5000 failed compounds. Assuming that the substituents shown in the structures above can be used at any of the diversity sites, what is the minimum number of ADDITIONAL substituents you would need to use in order to give a good probability of finding a