in cultures grown on synthetic medium supplemented with l-leucine and l-homoarginine , the metabolit 3-isobuty1-6 ( 4-guanidinobuty1 ) -2- ( 1h ) pyrazinone was found , and in cultures that had been supplemented with l-norleucine and l-arginine , the metabolite 3-buty1-6- ( 3-guanidinopropy1 ) -2 ( 1h ) pyrazinone was found .
C0019877
homoarginine
C0003765
l-arginine