It as-par-tame, fyi. Aspartame a brand name but it's taken from the parent compound, aspartate (the neutral form of aspartic acid) which is pronounced with the same conventions as any other chemical compound.

The funny story that gets told about this in organic chemistry is that the reason aspartame was discovered was that a lab assistant who was told to synthesize aspartame misheard his supervisor when he was told to test the compound. He heard "taste" the compound, and when he did, he found that it was sweet.

When he didn't die, they started selling it hahaha.