A 19-membered macrocyle incorporating a benzoquinone ring and a lactam functionality. It is an ansamycin antibiotic that induces apoptosis and displays antitumour effects. ChEBI: Herbimycin is a 19-membered macrocyle incorporating a benzoquinone ring and a lactam functionality. It is an ansamycin antibiotic that induces apoptosis and displays antitumour effects. It has a role as an antimicrobial agent, a Hsp90 inhibitor, a herbicide, a tyrosine kinase inhibitor and an apoptosis inducer. It is a lactam, a macrocycle and a member of 1,4-benzoquinones.