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We further demonstrated significant anti - tumor effects mediated by cytotoxic somatostatin analogs , AN - 162 and AN - 238 , by LHRH antagonist , Cetrorelix , by the cytotoxic LHRH analog , AN - 152 , and by recently developed GHRH antagonist , MIA - 602 , on MPC and for AN - 152 and MIA - 602 on MTT cells .
 somatostatin, Cetrorelix
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 somatostatin, Cetrorelix