text:  <unk> of the <unk> <unk> are generally also subsumed under the same name . For example , an α @-@ β , γ @-@ <unk> <unk> <unk> can undergo a similar <unk> <unk> <unk> that is typically referred to as an <unk> @-@ <unk> <unk> reaction . Other such extensions have been given similar names , including <unk> @-@ <unk> <unk> and <unk> <unk> <unk> . 
  