diff --git a/input/kinetics/families/SubstitutionS/groups.py b/input/kinetics/families/SubstitutionS/groups.py
index 9c8765e4a6..ffe37355de 100644
--- a/input/kinetics/families/SubstitutionS/groups.py
+++ b/input/kinetics/families/SubstitutionS/groups.py
@@ -11,6 +11,11 @@
 
 reversible = True
 
+reverseMap = {'*1': '*1', '*2': '*3', '*3': '*2'}
+reactantNum = 2
+productNum = 2
+
+
 recipe(actions=[
     ['BREAK_BOND', '*1', 1, '*2'],
     ['FORM_BOND', '*1', 1, '*3'],
@@ -21,17 +26,26 @@
 entry(
     index = 0,
     label = "S-RR_or_RRrad",
-    group = "OR{S-RR, S-RRrad}",
+    group = 
+"""
+1 *1 S2s u0 p2 c0 {2,S} {3,S}
+2 *2 R   ux {1,S}
+3    R   u0 {1,S}
+""",
     kinetics = None,
 )
 
 entry(
     index = 1,
     label = "YJ",
-    group = "OR{Y_2centeradjbirad, HJ, CJ, O_rad, SJ, Y_1centerbirad}",
+    group = 
+"""
+1 *3 R u[1,2]
+""",
     kinetics = None,
 )
 
+
 entry(
     index = 2,
     label = "S-RR",