Task: Please answer the following question about the molecule with SMILES CCCC(=O)OCOC(=O)C(C)(C)C.
Request: Please describe this drug.
Result: Pivaloyloxymethyl butyrate (AN-9), an acyloxyalkyl ester prodrug of butyric acid (BA), exhibited low toxicity and significant anticancer activity in vitro and in vivo. It shows greater potency than BA at inducing malignant cell differentiation and tumor growth inhibition and has demonstrated more favorable toxicological, pharmacological, and pharmaceutical properties than BA in preclinical studies.
Task: Please answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
CCCC(=O)OCOC(=O)C(C)(C)C
CCCC(=O)OCOC(=O)C(C)(C)C
butanoyloxymethyl 2,2-dimethylpropanoate
Please describe this drug.