compound of the formula wherein R' and R⁴ are independently amino or an organic residue bonded through nitrogen, R² is hydrogen or alkyl which may be substituted, R³ is hydrogen or a protecting group and R5 is hydroxyl which may be substituted or amino which may be substituted or salts thereof; with the proviso that when R¹ is amino, sorbylamino or hexanoylamino, R² is hydrogen or methyl, R⁴ is amino which may be protected adn R⁵ is hydroxyl or 2-amidinoethylamino, R³ is a protecting group, and that when R¹ is amino, leucylamino, acetylamino or benzyloxycarbonylamino, R³ is hydrogen, methyl or 2-tettrahydropyranyl, R⁴ is amino, acetylamino or benzyloxycarbonylamino and R⁵ is hydroxyl which may be substituted or amino which may be substituted, R² is alkyl which may be substituted, has antibacterial activities against drug-resistant bacteria and therefore can be useful as a chemotherapeutic drug for bacterial infections in mammals.

compound of the formula wherein R' and R⁴ are independently amino or an organic residue bonded through nitrogen, R² is hydrogen or alkyl which may be substituted, R³ is hydrogen or a protecting group and R5 is hydroxyl which may be substituted or amino which may be substituted or salts thereof; with the proviso that when R¹ is amino, sorbylamino or hexanoylamino, R² is hydrogen or methyl, R⁴ is amino which may be protected adn R⁵ is hydroxyl or 2-amidinoethylamino, R³ is a protecting group, and that when R¹ is amino, leucylamino, acetylamino or benzyloxycarbonylamino, R³ is hydrogen, methyl or 2-tettrahydropyranyl, R⁴ is amino, acetylamino or benzyloxycarbonylamino and R⁵ is hydroxyl which may be substituted or amino which may be substituted, R² is alkyl which may be substituted, has antibacterial activities against drug-resistant bacteria and therefore can be useful as a chemotherapeutic drug for bacterial infections in mammals.

A soil disease controlling agent for preventing and controlling diseases caused by pathogenic fungi living in soil, which comprises an effective amount of at least one of a 2-cycloalkenylamine derivative and its salts as an active ingredient, and at least one inert carrier or diluent.

A plant growth regulating composition comprising as the active ingredient an amidinoformic acid derivative of the formula: wherein R₁ is a hydrogen atom, a C₁-C₃ alkyl group, a C₁-C₃ alkoxy group, a C₁-C₃ alkylthio group or a halogen atom, R₂s are, the same or different, each a C₁-C₃ alkyl group or a halogen atom, R₃ is a hydroxy group, a C₁-C₅ alkoxy group, a benzyloxy group or a di(C₁-C₃)alkylamino group and n is an integer of 0, 1 or 2, or its salt, and an inert carrier or diluent.

Salts of pentamidine, formulations containing such salts and the use of such salts for treatment or prophylaxis of pneumocystis carinii. Pentamidine gluconate and lactate has been discovered and found to have high water solubility while providing potentially less toxic alternatives to pentamidine isethionate, especially for aerosolized administration to patients suffering from acquired immunodeficiency syndrome, AIDS, or AIDS related complex, ARC.

Salts of pentamidine, formulations containing such salts and the use of such salts for treatment or prophylaxis of pneumocystis carinii. Pentamidine gluconate and lactate has been discovered and found to have high water solubility while providing potentially less toxic alternatives to pentamidine isethionate, especially for aerosolized administration to patients suffering from acquired immunodeficiency syndrome, AIDS, or AIDS related complex, ARC.