An acetal is a functional group with the following connectivity R2C(OR')2, where both R' groups are organic fragments.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: An acetal is a functional group with the following connectivity R2C(OR')2, where both R' groups are organic fragments. ### Response: .