Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. 388109-26-0, Name is Ethyl 3-oxotetrahydro-2H-pyran-4-carboxylate, molecular formula is C8H12O4. In a Patent，once mentioned of 388109-26-0, Synthetic Route of 388109-26-0
The present application describes modulators of CCR3 of formula (I): or pharmaceutically acceptable salt forms thereof, useful for the prevention of asthma and other allergic diseases.
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Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics