日韩精品视频,双腿张开被9个黑人调教影片,欧美大屁股熟妇BBBBBB,男男少年乖H调教跪趴SM视频

S-Benzylsuccinic acid

CAS No. 3972-36-9

Quality standard
Appearance: white or off-white crystalline powder Melting point:158～164℃
Chemical Purity（HPLC）≥99％, Optical Purity≥99.5％, Individual impurity≤0.5％.