2-Cyclopenten-1-one, 3-ethyl-2-hydroxy- 2-Hydroxy-3-ethyl-2-cyclopenten-1-one 2-Hydroxy-3-ethyl-2-cyclopentene-1-one 21835-01-8 3-ETHYL-2-HYDROXY-2-CYCLOPENTEN-1-ONE 3-Ethyl-2-cyclopenten-2-ol-1-one 3-Ethyl-2-hydroxycyclopent-2-en-1-one EINECS 244-606-5 FEMA No. 3152