1222-90-8 2,5-Piperazinedione, 3-(2-methylpropylidene)-6-(phenylmethylene)-, (Z,Z)- 2,5-Piperazinedione, 3-benzylidene-6-isobutylidene- 3-Benzylidene-6-isobutylidene-2,5-dioxopiperazine Albonoursin Albonoursine Albonursin B-73 P-42-2