The invention relates to a novel strain Saccharothrix actinomycete SA 103 deposited at CNCM on 16 Feb. 2004, number 1-3160 or a mutant strain thereof; a method and a medium for selection of said strain; and a method for the production of a broth, active concentrate and active compounds from a culture of said strain SA 103. The invention also relates to active compounds which can be obtained by the production method, i.e. novel mutatimycins and aldgamycins, pharmaceutical compositions comprising said active compounds and the use thereof in medicine and phytopharmaceuticals.