Which substrate has an OMIM of 176000?
CREATE TABLE table_79168 (
    "Enzyme" text,
    "Location" text,
    "Substrate" text,
    "Product" text,
    "Chromosome" text,
    "OMIM" real,
    "Porphyria" text
)
SELECT "Substrate" FROM table_79168 WHERE "OMIM" = '176000'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Which substrate has an OMIM of 176000? ### Input: CREATE TABLE table_79168 (
    "Enzyme" text,
    "Location" text,
    "Substrate" text,
    "Product" text,
    "Chromosome" text,
    "OMIM" real,
    "Porphyria" text
) ### Response: SELECT "Substrate" FROM table_79168 WHERE "OMIM" = '176000'