The present invention pertains generally to certain compounds of the deoxyactagardine A and B type. Such compounds are suitable for use in the treatment of microbial infections, for exampleClostridiuminfection, such asC. perfringens,C. difficile,C. tetani, and/orC. botulinum, in particularC. difficile,especially infection of the colon and/or lower intestines and diarrhoea associated with the microbial infection.本發明大體係關於去氧艾克特卡丁(deoxyactagardine)A及B型之某些化合物。該等化合物適用於治療微生物感染,例如梭菌(Clostridium)感染(如:產氣莢膜梭菌(C.perfringens)、艱難梭菌(C.difficile)、破傷風梭菌(C.tetani)、及/或肉毒桿菌(C.botulinum),特定言之艱難梭菌),尤其係結腸及/或下腸部之感染,及與微生物感染相關的腹瀉。