anchor.diff:  * reactant, only used for reaction type filter, molecule identifier of molecule that has selected molecules as product
   * name, only used for reaction type filter, name of reaction, selects molecules which where reactant or product in the given reaction
   
  +Example 1: Molecules which have been found in MS data 
  +````json
  +[{"type":"numeric","comparison":"gt","value":0,"field":"nhits"}]
  +````
  +Example 2: Molecules which are products of esterase reaction of molecule with id 1
  +[{"reactant":1,"name":"esterase","type":"reaction","field":"reactionsequence"}]
  +
   ## Paging
   
   For paging the following url parameters can be used:
  
positive.code: 
  # Authentication
  
  MAGMa supports cookie based authentication method. Login will set cookie and this cookie can be used to access the application.
  
  MAGMa runs in 2 modes:
  
  
negative.code: When molecule is uploaded or drawn then they can be metabolized.
  
  Form fields:
  
  * metabolize, Can be true==1 or false==0
  * scenario, json array of object with type and steps keys. 
  
  