成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天
?
sci
hub
對所有人的知識
↓ 下載
Dang, T. T., Dang, T. T., & Langer, P. (2007).
One-pot synthesis of pyrazole-5-carboxylates by cyclization of hydrazone 1,4-dianions with diethyl oxalate. Tetrahedron Letters, 48(20), 3591–3593.
doi:10.1016/j.tetlet.2007.03.093
10.1016/j.tetlet.2007.03.093
