100646-51-3 Assure II DPX-Y6202-31 Ethyl (R)-2-(4-((6-chloro-2-quinoxalinyl)oxy)phenoxy)propanoate NCI-861094 Propanoic acid, 2-(4-((6-chloro-2-quinoxalinyl)oxy)phenoxy)-, ethyl ester, (R)- Quizalofop-p-ethyl