62295-74-3 ANSAMYCIN: RIFAMYCIN DERIV LM165 NSC295113 Rifamycin XIV, 1',4-didehydro-1-deoxy-1,4-dihydro-1-oxo-5'-(phenylmethyl)- Spiro[9,4-(epoxypentadeca[1,11,13]trienimino)- 2H-furo[2',3':7,8]naphth[1,2-d]imidazole-2,4'-piperidine], rifamycin XIV deriv.