Methoxy Isobutyl Pyrazine

…if you add an acid to ammonia, ammonia turns into ammonium ions that do not smell. Unfortunately, the smell returns after a while.

…it takes 150,000 mg of ethane per cubic meter ambient air for the nose to perceive the smell – but only 0.0000036 mg of methoxyisobutylpyrazine? This difficult-to-pronounce substance can thus be said to smell 42 billion (!) times stronger than ethane.