18293
The structures of the new compounds were unambiguously elucidated by 1D ( ( 1 ) H , ( 13 ) C ) , 2D NMR ( COSY , HSQC , and HMBC ) and by mass spectroscopy .
 Chemical: ( 1 ) H; Chemical: ( 13 ) C
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: ( 1 ) H; Chemical: ( 13 ) C