Reading Markush structure

Hey,
With which node can we read a structure such that: ([$ ([] - [! R]): 1] - [$ ([! R] - [: 1]): 2]). ([$ ([] - [! R]): 3] - [$ ([! R] - [: 3]): 4]) >> ([: 1] - [: 4 ]). ([: 3] - [: 2])

If anyone has an idea thank you!

Look here:

Hi Izaychik63 !

Thank you so much but nodes proposed are not up to date

Try NodePit site: