7468
When administered acutely , ARI and ETIC increased the choice of low cocaine doses , and only ( - ) - NPA decreased the choice of higher cocaine doses and cocaine intake ; effects were similar across social ranks .
 Chemical: ARI; Chemical: ETIC; Chemical: cocaine; Chemical: ( - ) - NPA; Chemical: cocaine; Chemical: cocaine
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: ARI; Chemical: ETIC; Chemical: cocaine; Chemical: ( - ) - NPA; Chemical: cocaine; Chemical: cocaine