What are the names of enzymes whose product is not 'Heme'?
SELECT name FROM enzyme WHERE product != 'Heme'
SELECT name FROM enzyme WHERE product != 'Heme'
[{'name': 'ALA synthase'}, {'name': 'ALA dehydratase'}, {'name': 'PBG deaminase'}, {'name': 'Uroporphyrinogen III synthase'}, {'name': 'Uroporphyrinogen III decarboxylase'}, {'name': 'Coproporphyrinogen III oxidase'}, {'name': 'Protoporphyrinogen oxidase'}]