FOERFARANDE FOER FRAMSTAELLNING AV CEFALOSPORINANTIBIOTICA
There are described compounds of formula (I) (I) wherein R, R1 and R2 which may be the same or different, each represents a hydrogen atom or a C1-4 alkyl group and R3 represents a C1-4 alkyl group with the proviso that, when both R1 and R2 represent hydrogen atoms, R3 represents other than a methyl...
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