2-propynoic acid, 3-(2-chlorophenyl)-, ethyl ester InChI=1/C11H9ClO2/c1-2-14-11(13)8-7-9-5-3-4-6-10(9)12/h3-6H,2H2,1H ethyl 3-(2-chlorophenyl)prop-2-ynoate