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Boldine ( [ s ] - 2 , 9 - dihydroxy - 1 , 10 - dimethoxyaporphine ) is a major alkaloid present in the leaves and bark of the boldo tree ( Peumus boldus Molina ) , with known an antioxidant activity .
 Chemical: Boldine; Chemical: [ s ] - 2 , 9 - dihydroxy - 1 , 10 - dimethoxyaporphine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: Boldine; Chemical: [ s ] - 2 , 9 - dihydroxy - 1 , 10 - dimethoxyaporphine