10516
A robust , practical synthesis of ( 20S ) - 10 - ( 3 - aminopropyloxy ) - 7 - ethylcamptothecin ( T - 2513 , 5 ) , which is a water - soluble analogue of camptothecin , has been developed .
 Chemical: ( 20S ) - 10 - ( 3 - aminopropyloxy ) - 7 - ethylcamptothecin; Chemical: T - 2513; Chemical: camptothecin
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: ( 20S ) - 10 - ( 3 - aminopropyloxy ) - 7 - ethylcamptothecin; Chemical: T - 2513; Chemical: camptothecin