补充描述:
2-Oxa-7-aza-spiro[4.4]nonane (CAS 175-97-3) is a pharmaceutical-grade intermediate manufactured directly by Shanghai Rlavie Technology Co., Ltd. at 98% minimum purity, backed by COA, HNMR and HPLC/GC documentation. It complies with a wide range of pharmacopeia standards and is sold worldwide, with free samples available.
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