2440
Proniosomes were prepared by film deposition on carrier ' s method using various molar ratios of nonionic surfactants such as span20 , span40 , span60 , and span80 with cholesterol as membrane stabilizing agent and dicetylphosphate as a charge inducer .
 Chemical: span20; Chemical: span40; Chemical: span60; Chemical: span80; Chemical: cholesterol; Chemical: dicetylphosphate
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: span20; Chemical: span40; Chemical: span60; Chemical: span80; Chemical: cholesterol; Chemical: dicetylphosphate