4357
5 . 9 g of 96 . 5 % sulforaphene was obtained from 9 . 5 g of the sulforaphene - rich extract after purification by preparative HPLC .
 sulforaphene, sulforaphene
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 sulforaphene, sulforaphene