例句與造句

1. It can be seen as a fourfold ester of tetrahydroxy-1, 4-benzoquinone and oxalic acid.
2. It can be seen as a fourfold ester of tetrahydroxy-1, 4-benzoquinone and carbonic acid.
3. This compound is believed to be oxygenated to the 3, 6, 7, 8-tetrahydroxy derivative, then triply " O "-methylated by KedN1, an " O "-methyltransferase.
4. Many relatives of these oxides have been investigated theoretically, and some are expected to be stable, such as other carbonate and oxalate esters of tetrahydroxy-1, 2-benzoquinone and of the rhodizonic, croconic, squaric, and deltic acids.
5. The enzyme 3-methylquercetin 7-O-methyltransferase uses S-adenosyl methionine and 5, 7, 3', 4'- tetrahydroxy-3-methoxyflavone ( isorhamnetin ) to produce S-adenosylhomocysteine and 5, 3', 4'- trihydroxy-3, 7-dimethoxyflavone ( rhamnazin ).
6. It's difficult to find tetrahydroxy in a sentence. 用tetrahydroxy造句挺難的
7. "Bulbophyllum reptans " contains gymnopusin, confusarin ( 2, 7-dihydroxy-3, 4, 8-trimethoxyphenanthrene ), 2, 7-dihydroxy-3, 4, 6-trimethoxyphenanthrene and its 9, 10-dihydro derivative, flavanthrinin ( 2, 7-dihydroxy-4-methoxyphenanthrene ) and its 9, 10-dihydro derivative ( coelonin ), cirrhopetalanthrin ( 2, 22, 7, 72-tetrahydroxy-4, 42-dimethoxy-1, 12-biphenanthryl ), its 9, 92, 10, 102-tetrahydro derivative ( flavanthrin ) and the dimeric phenanthrenes reptanthrin and isoreptanthrin.