Drools validation failing with error as "unterminated string literal"

Question

I have defined a rule with following condition.

 [ "asmi\"sinternational", "brand1" ] contains msku.brand 

Validation of this rule is failing with error as

Unable to Analyse Expression [ "asmi\"sinternational" ] contains msku.brand: [Error: unterminated string literal] [Near : {... [ "asmi\"sinternational" ] contains msku.brand ....}]

Note : Double quote is escaped by "\".

How can I define a list of strings where one string contains double quote as character while defining rule ?

Thanks.