16055
Near infrared fluorescence imaging in vivo for liver cancer , lung cancer and melanoma cancer with tumor bearing nude mice as models demonstrated that lactose substituted zinc phthalocyanine has specifically targeting ability to liver cancer while no targeting to lung cancer or melanoma , which implied its potential in liver cancer diagnosis as a near infrared optical probe .
 lactose, zinc phthalocyanine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 lactose, zinc phthalocyanine