11949
Previously , we reported that ( - ) - xanthatin , a naturally occurring xanthanolide present in the Cocklebur plant , exhibits potent anti - proliferative effects on human breast cancer cells , accompanied by an induction of the growth arrest and DNA damage - inducible gene 45 gamma ( GADD45 gamma ) , recognized recently as a novel tumor suppressor gene .
 Chemical: ( - ) - xanthatin; Chemical: xanthanolide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ( - ) - xanthatin; Chemical: xanthanolide