11100
A novel unusual pentacyclic hemiacetal sterol nephthoacetal ( 1 ) , was isolated from soft coral Nephthea sp .
 pentacyclic hemiacetal sterol, nephthoacetal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 pentacyclic hemiacetal sterol, nephthoacetal