These eight structures are of molecules which all have molecular formula C4H8O2. Their names are:
.......1. butanoic acid .................... 2. 2-methyl propanoic acid ........... 3. methyl propanoate
.......4. ethyl acetate ..................... 5. propyl formate .......................... 6. isopropyl formate
................................. 7. 3-hydroxy-2-butanone ..................... 8. dioxan
