Name the following molecules in which the ester group acts as a substituent

esters nomenclature
 
 
SOLUTION:
 
Molecule 1.
molecule 01
1. Main function: carboxylic acid
2. Numbering: g. functional with minor locator
3. Substituents: ester (methoxycarbonyl) in 4
4. Name: 4-Methoxycarbonylbutanoic acid
 
Molecule 2.
molecule 02
1. Main function: carboxylic acid
2. Numbering: g. functional with minor locant (unnumbered its carbon)
3. Substituents: 3-bromo and 5-(methoxycarbonyl) ester
4. Name: 3-bromo-5-methoxycarbonylcyclohexanecarboxylic acid
 
Molecule 3.
molecule 03
1. Main function: carboxylic acid
2. Numbering: g. functional with minor locator
3. Substituents: ester (ethoxycarbonyl) in 5
4. Name: 5-ethoxycarbonylhexanoic acid
 
Molecule 4.
molecule 04
1. Main function: carboxylic acid
2. Numbering: g. functional with minor locator
3. Substituents: ester (methoxycarbonyl) at 4, ethyl at 2 and methyl at 5
4. Name: 2-Ethyl-5-methyl-4-methoxycarbonylheptanoic acid
 
Molecule 5.
molecule 05
1. Main function: carboxylic acid
2. Numbering: g. functional with minor locator
3. Substituents: 5-(methoxycarbonyl)ester, 4-cyclopentyl
4. Name: 4-Cyclopentyl-5-methoxycarbonylhexanoic acid