8259
Novel chalcone based 6 - carbethoxy - 2 - cyclohexen - 1 - one and 2H - indazol - 3 - ol derivatives were synthesized and characterized by using spectral techniques like IR , ( 1 ) H NMR , ( 13 ) C NMR , COSY , DEPT , and GC - MS .
 chalcone, 6 - carbethoxy - 2 - cyclohexen - 1 - one, 2H - indazol - 3 - ol, ( 1 ) H, ( 13 ) C
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 chalcone, 6 - carbethoxy - 2 - cyclohexen - 1 - one, 2H - indazol - 3 - ol, ( 1 ) H, ( 13 ) C