20240
( + ) - Laburnamine ( 1 ) , a rare alkaloid extracted from Laburnum anagyroides seeds ( ~ 4 mg from 1 kg ) , was shown to bind with high affinity ( Ki , 293 nM ) to the alpha 4 beta 2 nicotinic receptor subtype , which is , respectively , 126 and 136 times higher than to the alpha 3 beta 4 ( Ki 37 mu M ) and alpha 7 subtypes ( Ki 40 mu M ) .
 Chemical: ( + ) - Laburnamine
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: ( + ) - Laburnamine