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In the previous paper,1} we reported the new pentanorlanostane derivative, cladosporide A (1), which showed the characteristic inhibition of the growth of Aspergillus fumigatus Fresenius, one of the major opportunistic human pathogens causing aspergillosis, along with nonactive 23 ,24,25 ,26,27-pentanorlanost-8-ene-3/3,22diol (5) from the CHCl3-Me0H (1:1) extract of Cladosporium sp. IFM 49189. Further investigation of the above fungus brought us the isolation of three new pentanorlanostane derivatives, cladosporides B (2)~D (4). The structure elucidation of 2~4 and the antifungal activity of these compoundsagainst A. fumigatus are discussed in this paper. The fungus Cladosporium sp. IFM 49189 was cultivated on rice (1500 g) as described in the previous paper.1} After 21 days of cultivation at 25°C, the cultivated rice was

New Pentanorlanostane Derivatives, Cladosporide B-D, as Characteristic Antifungal Agents Against Aspergillus fumigatus, Isolated from Cladosporium sp.