How to pronounce “acetaldehyde”(noun) in English

acetaldehyde is hard to measure, but your acetaldehyde levels are zero.

But also using alcohol dehydrogenase 2 to take that ethanol and convert it back to acetaldehyde.

Because the box is yeast using an enzyme called alcohol dehydrogenase 1 to turn something called acetaldehyde into ethanol and then excreting it.