What is the Class IB flammable liquid with the highest standard enthalpy of formation whose physically interacts with is Potassium inwardly-rectifying channel, subfamily J, member 5 ?
select ?ent where { ?ent wdt:P31 wd:Q21009055 . ?ent wdt:P3078 ?obj . ?ent wdt:P129 wd:Q21497881 } ORDER BY DESC(?obj)LIMIT 5 
class ib flammable liquid: Q21009055 potassium inwardly-rectifying channel, subfamily j, member 5: Q21497881