760
The alpha - linolenic ( C18 : 3 n - 3 ) and eicosapentaenoic ( 20 : 5 n - 3 ) acids were present only in Porphyra sp .
 Chemical: alpha - linolenic; Chemical: C18 : 3; Chemical: eicosapentaenoic
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: alpha - linolenic; Chemical: C18 : 3; Chemical: eicosapentaenoic