20052
Two structurally superimposable scaffolds - 4H - thiochromeno [ 4 , 3 - d ] thiazol - 2 - amine and 5 , 6 - dihydro - 4H - benzo [ 6 , 7 ] cyclohepta [ 1 , 2 - d ] thiazol - 2 - amine derivatives - yielded low - micromolar inhibitors , and two among them 37 and 43 also exhibited antiangiogenic activity in an endothelial tube formation assay .
 Chemical: 4H - thiochromeno [ 4 , 3 - d ] thiazol - 2 - amine; Chemical: 5 , 6 - dihydro - 4H - benzo [ 6 , 7 ] cyclohepta [ 1 , 2 - d ] thiazol - 2 - amine
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: 4H - thiochromeno [ 4 , 3 - d ] thiazol - 2 - amine; Chemical: 5 , 6 - dihydro - 4H - benzo [ 6 , 7 ] cyclohepta [ 1 , 2 - d ] thiazol - 2 - amine