碱是金属的氢氧化物。

A base is the hydroxide of a metal.

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本发明所述的衍生物为上述通式化合物的游离碱或盐。

The derivatives of the invention are free alkali or salt of the general formula compound.

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以上化合物均为首次从碱蓬属植物中分离得到。

All compounds were obtained from this plant for the first time.

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以上化合物均为首次从碱蓬属植物中分离得到。

All compounds were obtained from this plant for the first time.

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