14684
From the stems of Croton cascarilloides , eight new diterpenoids , named crotocascarins A - H ( 1 - 8 ) , having a crotofolane skeleton were isolated along with two new nor - diterpenoids ( 9 and 10 ) , named crotocascarins alpha and beta , derived through rearrangement of the crotofolane skeleton .
 diterpenoids, crotocascarins A - H, crotofolane, nor - diterpenoids, crotofolane
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 diterpenoids, crotocascarins A - H, crotofolane, nor - diterpenoids, crotofolane