abstract |
(57) [Summary] [Objective] To provide a novel antibiotic having antifungal activity. [Structure] Antibiotics AB4015-A1, -A2 and -A having antifungal activity and represented by the following general formula (I) 3 was obtained. These substances are useful as agricultural and horticultural fungicides. General formula (I): In the formula, R is the following formula for the substance AB4015-A1. And the bond between the 3 ′ and 4 ′ positions is a double bond, and R is the following formula in the AB4015-A2 substance: And the bond between the 3'and 4'positions is a single bond, and R is the following formula in the AB4015-A3 substance: And the bond between the 3'and 4'positions is a single bond. |