Concept:
Aspirin is a widely used analgesic, antipyretic, anti-inflammatory, and antiplatelet drug.
Step 1: Chemical name of aspirin.
The chemical name of aspirin is acetyl salicylic acid.
Step 2: Relationship with salicylic acid.
Aspirin is prepared by acetylation of salicylic acid. In this process, the hydroxyl group of salicylic acid is acetylated.
\[
\text{Salicylic acid} \rightarrow \text{Acetyl salicylic acid}
\]
Step 3: Checking other options.
Salicylic acid is the parent compound but not aspirin itself.
Acetyl salicylamide is not the correct chemical name of aspirin.
Benzoic acid is a different aromatic acid.
Step 4: Final answer.
Therefore, chemically aspirin is acetyl salicylic acid.
\[
\boxed{\text{Acetyl salicylic acid}}
\]