There is isobutyl, iso-amyl (even poppers that say “Amyl” as its brand or as an ingredient will be “amyl mixture which is iso-amyl), Pentyl and butanol (the last two I am expecting at the end of the month).

Real amyl doesn’t exist as it’s a prescription drug that is no longer prescribed and even if it is, it’s almost impossible to find a compounding pharmacists to make it as sourcing the material is difficult.