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

What are the names of enzymes who does not produce 'Heme'?
SELECT name FROM enzyme WHERE product <> 'Heme'
SELECT "name" FROM "enzyme" WHERE "product" <> 'Heme'