diff --git a/TRF_Wang_s109r543/TRF_Wang_s109r543_v.OFchem b/TRF_Wang_s109r543/TRF_Wang_s109r543_v.OFchem
index b855dea..4216b39 100644
--- a/TRF_Wang_s109r543/TRF_Wang_s109r543_v.OFchem
+++ b/TRF_Wang_s109r543/TRF_Wang_s109r543_v.OFchem
@@ -19,6 +19,8 @@ CO
 H2
 C7H16
 IC8H18
+OH
+CH2O
 )
 ;