3574
Supersaturated solutions of curcumin have demonstrated high phototoxicity toward several species of Gram positive ( G + ) bacteria as well as the G - Escherichia ( E ) coli .
 curcumin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 curcumin