To identify the structure of the unknown organic compound with the formula C10H12O3 using nuclear magnetic resonance NMR spectroscopy data, we would need the actual NMR spectra 1H-NMR, 13C-NMR, and possibly 2D-NMR like COSY, HSQC, and HMBC . However, since the data is not provided, I will guide you through the general steps to analyze NMR data and identify the structure of an unknown compound.1. Analyze the molecular formula: The given formula is C10H12O3. Calculate the degree of unsaturation also known as the index of hydrogen deficiency, IHD using the formula: IHD = 2C + 2 + N - H - X / 2, where C is the number of carbons, N is the number of nitrogens, H is the number of hydrogens, and X is the number of halogens. For this compound, IHD = 2*10 + 2 - 12 / 2 = 4. This indicates the presence of 4 double bonds, or a combination of double bonds and rings in the molecule.2. Analyze the 1H-NMR spectrum: Look for characteristic peaks, their chemical shifts, multiplicities singlet, doublet, triplet, etc. , and integration values proportional to the number of protons . This information will help you identify functional groups and the connectivity of protons in the molecule.3. Analyze the 13C-NMR spectrum: Look for characteristic peaks and their chemical shifts. This will help you identify the types of carbons in the molecule e.g., alkyl, carbonyl, aromatic, etc. .4. Analyze 2D-NMR spectra if available : COSY COrrelation SpectroscopY helps to identify directly coupled protons, HSQC Heteronuclear Single Quantum Coherence correlates protons with their directly attached carbons, and HMBC Heteronuclear Multiple Bond Correlation correlates protons with carbons that are two or three bonds away. These spectra can provide valuable information about the connectivity of atoms in the molecule.5. Assemble the pieces: Combine the information from the NMR spectra to propose a structure for the unknown compound. Make sure the proposed structure is consistent with the molecular formula and the IHD value.6. Verify the structure: Check if the proposed structure is consistent with all the NMR data chemical shifts, multiplicities, and integration values . If necessary, revise the structure and repeat the verification process.In summary, without the actual NMR data, it is impossible to provide a specific structure for the unknown compound with the formula C10H12O3. However, following the steps outlined above will help you analyze NMR data and identify the structure of an unknown compound.