Get all the reaction of a given pathway according to the pathway's name introduced

Database: 
Statement: 
Get all the reactions according to a component's name introduced $reaction_name$ (e.g. Succinylbenzoyl-CoA)
A limit of results per page $number$ (e.g. 10)
Query: 
select distinct ?reaction_name where { ?pathway <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://khaos.uma.es/pathways/Pathway>. ?pathway <http://khaos.uma.es/pathways/reaction> ?reaction . ?reaction <http://khaos.uma.es/pathways/name> ?reaction_name . FILTER(regex( ?reaction_name,"??reaction_name", "i")) } order by ?pathname limit ??number