22020
Cyclization of obtained amides led to methyl 2 ' - { [ ( E ) - 3 beta - acetoxyandrost - 5 - en - 17 - ylidene ] methyl } - ( 4 ' S ) - 4 ' , 5 ' - dihydro - 1 ' , 3 ' - oxazole - 4 ' - carboxylate and methyl 2 ' - { [ ( E ) - 3 beta - acetoxyandrost - 5 - en - 17 - ylidene ] methyl } - ( 4 ' R ) - 4 ' , 5 ' - dihydro - 1 ' , 3 ' - oxazole - 4 ' - carboxylate which were transformed to titled compounds 1 - 4 .
 Chemical: amides; Chemical: methyl 2 ' - { [ ( E ) - 3 beta - acetoxyandrost - 5 - en - 17 - ylidene ] methyl } - ( 4 ' S ) - 4 ' , 5 ' - dihydro - 1 ' , 3 ' - oxazole - 4 ' - carboxylate; Chemical: methyl 2 ' - { [ ( E ) - 3 beta - acetoxyandrost - 5 - en - 17 - ylidene ] methyl } - ( 4 ' R ) - 4 ' , 5 ' - dihydro - 1 ' , 3 ' - oxazole - 4 ' - carboxylate
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: amides, methyl 2 ' - { [ ( E ) - 3 beta - acetoxyandrost - 5 - en - 17 - ylidene ] methyl } - ( 4 ' S ) - 4 ' , 5 ' - dihydro - 1 ' , 3 ' - oxazole - 4 ' - carboxylate, methyl 2 ' - { [ ( E ) - 3 beta - acetoxyandrost - 5 - en - 17 - ylidene ] methyl } - ( 4 ' R ) - 4 ' , 5 ' - dihydro - 1 ' , 3 ' - oxazole - 4 ' - carboxylate 
Answer:
 Chemical: amides; Chemical: methyl 2 ' - { [ ( E ) - 3 beta - acetoxyandrost - 5 - en - 17 - ylidene ] methyl } - ( 4 ' S ) - 4 ' , 5 ' - dihydro - 1 ' , 3 ' - oxazole - 4 ' - carboxylate; Chemical: methyl 2 ' - { [ ( E ) - 3 beta - acetoxyandrost - 5 - en - 17 - ylidene ] methyl } - ( 4 ' R ) - 4 ' , 5 ' - dihydro - 1 ' , 3 ' - oxazole - 4 ' - carboxylate