hmbc meaning in English

Many kinds of chromatograph including silica gel , d101 resin , sephadex l - 20 gel , rp - 8 and hplc are used in extracting and separating chemical constituents form these plants . certainly , they need to select the best eluate by tlc . some technique including ms ( ei - ms , fab - ms ) , id and 2d nmr ( cosy , roesy , hmbc , hmqc ) been used in identifying these chemical structures
通过各种硅胶柱层析，吸附树脂， sephadex系列凝胶树脂以及rp - 8类反向柱等层析材料以及高效液相色谱等技术，利用不同的洗脱体系对这两种植物的化学成分进行分离得到纯的单体化合物，然后利用ms ( ei - ms ， fab - ms ) 、一维nmr 、二维nmr ( cosy ， roesy ， hmbc ， hmqc )等技术对这些化合物进行结构鉴定，利用ir和uv对这些化合物进行了表征。