CREATE TABLE enzyme (id DECIMAL, name TEXT, location TEXT, product TEXT, chromosome TEXT, omim DECIMAL, porphyria TEXT)
CREATE TABLE medicine_enzyme_interaction (enzyme_id DECIMAL, medicine_id DECIMAL, interaction_type TEXT)
CREATE TABLE medicine (id DECIMAL, name TEXT, trade_name TEXT, fda_approved TEXT)

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'