begin parameters
 kp1 1
 km1 1
 kp2 1
 km2 1
 kp3 1
 km3 1
 R0  3e5
 L0  3e5
end parameters

begin species
  R(r,r) R0
  L(l,l) L0
end species

begin reaction rules
# Ligand addition
R(r) + L(l,l) <-> R(r!1).L(l!1,l) kp1,km1

# Chain elongation
R(r) + L(l,l!2) <-> R(r!1).L(l!1,l!2) kp2,km2

# Ring closure
R(r).L(l) <-> R(r!1).L(l!1) kp3,km3

end reaction rules

generate_network({overwrite=>1,check_iso=>0,max_stoich=>{R=>10,L=>10}});