23503
Flinderoles A , B , and C , desmethylflinderole C , isoborreverine , and dimethylisoborreverine can each be synthesized in three steps from tryptamine .
 Flinderoles A , B , and C, isoborreverine, dimethylisoborreverine, tryptamine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Flinderoles A , B , and C, isoborreverine, dimethylisoborreverine, tryptamine