过[氧]二碳酸二（二级丁酯）
di-sec-butyl perdicarbonate
di-sec-butyl peroxy-dicarbonate
di-sec-butyl peroxy-dicarbonate
di-sec-butyl perdicarbonate
Ⅱ级构造单元
second order ore-controlling tectonic unit
次级构造容矿
subsidiary ore-bearing structure
蛋白质三级构造
tertiary structure of protein
省一级构造单元边界
the boundary of the first-grade structure unit
一级构造单元
first-order tectonic unit