NOVEL MACROCYCLIC LACTONES AND A PRODUCTIVE STRAIN THEREOF.

摘要

This invention provides the novel culture, Streptomyces hygroscopicus FERM BP-3688 and the macrocyclic lactones which were produced by the culture Streptomyces hygroscopicus (FERM BP-3688), Actinoplanes sp. (FERM BP-3832) or Streptomyces toyocaensis subsp.humicola (ATCC 39471) and an immunosuppressive agent, an antimycotic agent and an antitumor agent which comprises the said macrocyclic lactones. The macrocyclic lactones have formula (I) wherein R<1> is oxygen, two hydrogens or one hydrogen and one hydroxy; R<2>, R<3> and R<5> are each independently hydrogen, hydroxy or methoxy; and R<4> is hydroxy or hydrogen; provided that when R<1> is oxygen, R<4> is hydroxy and R<2> and R<5> are methoxy, R<3> is neither hydrogen nor methoxy.