As explained in Chapter 1, the urethane group is the product of the reaction of a hydroxy compound with an isocyanate group (reaction 4.8).
正如第1章解释，聚氨酯组是羟基化合物与异氰酸酯组的反应(反应4.8)的产品。
Objective:To estimate the feasibility of continuous target controlled infusion of isopropyl hydroxy-benzene in compound epidural block of epigastrium operation.
目的：评价持续靶控输注异丙酚复合硬膜外阻滞有用于上腹部手术的可行性。
Moreover, catalytic hydrogenation can be used to the reduction of a variety of organic compounds, such as nitro, carbonyl, amino, aromatic and heteroaromatic compound, hydroxy group and carboxy group.
此外，它除了还原双键以外可以用来还原各种不同的有机化合物，如：硝基、羰基、氨基、芳香族及杂环化合物、羟基、羧基。
Results A new benzophenone was isolated and identified as 2-methoxy-3,4-methylenedioxy-benzophenone (I), along with a known compound 4-hydroxy-2,6-dimethoxy-benzophenone (II).
结果分离鉴定了2个二苯酮化合物，其结构分别为2 甲氧基- 3， 4 -亚甲二氧基-二苯酮（I）， 4 羟基-2， 6 -二甲氧基-二苯酮（II）。
Sugar was as the start material by the reaction of the selective protections at 6-hydroxy, chlorination, deacetyl in three steps obtained the target compound(trichlorosucrose);
以蔗糖为起始原料，经羟基选择性保护、氯化、脱乙酰基等3步化学反应合成三氯蔗糖；
Sugar was as the start material by the reaction of the selective protections at 6-hydroxy, chlorination, deacetyl in three steps obtained the target compound(trichlorosucrose);
以蔗糖为起始原料，经羟基选择性保护、氯化、脱乙酰基等3步化学反应合成三氯蔗糖；
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