1(2H)-Pyridinecarboxylic acid, 3,6-dihydro-5-((2-propynyloxyimino)methyl)-, ethyl ester, (E)- 145071-31-4 Ethyl (E)-3,6-dihydro-5-((2-propynyloxyimino)methyl)-1(2H)-pyridinecarboxylate