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In situ C - C bond cleavage of vicinal diol following by the lactolisation resulted from separated treatment of Arjunolic acid ( 1 ) , 24 - hydroxytormentic acid ( 2 ) and 3 - O - beta - D - glucopyranosylsitosterol ( 3 ) with sodium periodate and silica gel in dried THF according to the strategic position of hydroxyl functions in the molecule .
 C - C, vicinal diol, Arjunolic acid, 24 - hydroxytormentic acid, 3 - O - beta - D - glucopyranosylsitosterol, sodium periodate, silica gel, THF, hydroxyl
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 C - C, vicinal diol, Arjunolic acid, 24 - hydroxytormentic acid, 3 - O - beta - D - glucopyranosylsitosterol, sodium periodate, silica gel, THF, hydroxyl