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Crambescins and crambescidins are two families of guanidine alkaloids from the marine sponge Crambe crambe .
 Chemical: Crambescins; Chemical: crambescidins; Chemical: guanidine alkaloids
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: Crambescins; Chemical: crambescidins; Chemical: guanidine alkaloids