do not use sum formula for mol name in report

app/models/sample.rb

@@ -363,7 +363,7 @@ class Sample < ActiveRecord::Base
 
   def molecule_name_hash
     mn = molecule_name
-    mn ? { label: mn.name, value: mn.id } : {}
+    mn ? { label: mn.name, value: mn.id, desc: mn.description } : {}
   end
 
 private

lib/reporter/docx/detail_reaction.rb

@@ -438,7 +438,7 @@ module Reporter
 
       def sample_molecule_name_delta(sample)
         mnh = sample[:molecule_name_hash]
-        smn = mnh ? mnh[:label] : nil
+        smn = mnh && mnh[:desc] != 'sum_formular' ? mnh[:label] : nil
         iupac = sample[:molecule] ? sample[:molecule][:iupac_name] : nil
         if smn.present?
           [{ 'insert' => smn.to_s }]