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The leading cyclic polyamine disulfide was shown to be the spermine tetra - amine disulfide ( TetraN - 3 , 4 , 3 ) .
 Chemical: cyclic polyamine disulfide; Chemical: spermine tetra - amine disulfide; Chemical: TetraN - 3 , 4 , 3
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: cyclic polyamine disulfide; Chemical: spermine tetra - amine disulfide; Chemical: TetraN - 3 , 4 , 3