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M-4 and IsoM-4 derivatives their preparation and compositions containing them

Image Number 4 for United States Patent #4479965.

Tetrahydro-M-4 and tetrahydro-IsoM-4 hydroxy carboxylic acids of the formula (I): ##STR1## wherein one of R.sup.1 and R.sup.2 represents a hydrogen atom and the other represents a hydroxy group which are useful for inhibiting chloresterol biosynthesis in the liver. The invention also provides pharmaceutical compositions containing said lactone(s).

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