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Taking this into account , and the fact that ion channels are frequent targets for natural toxins , we examined the effect of Cramb816 and three compounds from the crambescin family , norcrambescin A2 ( NcrambA2 ) , crambescin A2 ( CrambA2 ) , and crambescin C1 ( CrambC1 ) , in the main voltage - dependent ion channels in neurons : sodium , potassium , and calcium channels .
 Chemical: Cramb816; Chemical: crambescin; Chemical: norcrambescin A2; Chemical: NcrambA2; Chemical: crambescin A2; Chemical: CrambA2; Chemical: crambescin C1; Chemical: CrambC1; Chemical: sodium; Chemical: potassium; Chemical: calcium
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: Cramb816; Chemical: crambescin; Chemical: norcrambescin A2; Chemical: NcrambA2; Chemical: crambescin A2; Chemical: CrambA2; Chemical: crambescin C1; Chemical: CrambC1; Chemical: sodium; Chemical: potassium; Chemical: calcium