Chemistry — Multi-step Reaction Mechanism

{
  "elements":[
    {"data":{"id":"r","label":"Reactants"}},
    {"data":{"id":"i1","label":"Intermediate 1"}},
    {"data":{"id":"ts","label":"Transition state"}},
    {"data":{"id":"i2","label":"Intermediate 2"}},
    {"data":{"id":"p","label":"Products"}},
    {"data":{"source":"r","target":"i1","label":"step 1"}},
    {"data":{"source":"i1","target":"ts","label":"rate-determining"}},
    {"data":{"source":"ts","target":"i2","label":"step 2"}},
    {"data":{"source":"i2","target":"p","label":"step 3"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}