[The search for new antiparasitic agents. 12. The synthesis and study of the anti-Echinococcus and anti-Hymenolepis activity of 6-[4-(4-alkylpiperazinyl-1)-phenylamino]-1,2,5-thiadazolo[3 ,4-h] quinolines]. / Izyskanie novykh protivoparazitarnykh sredstv. 12. Sintez i izuchenie protivoékhinokokkoznoi i protivogimenolepidoznoi aktivnosti 6-[4-(4-alkilpiperazinil-1)-fenilamino]-1,2,5-tiadiazolo[3,4-h] khinolinov.

The paper describes the synthesis of 6-[4-alkylpiperazinyl-1)phenylamino]-1,2,5-thiadiazolo[3,4-h ]quinolines where methyl (Drug G-1574) and ethyl (Drug G-1569) are alkyls. The two agents are as effective as mebendazole against the larval stage of Echinococcus multilocularis infection. Drug G-1574 has been demonstrated to ensure 100% recovery of spontaneously Hymenolepis nana-infected albino mice given doses 2.5-5 times lower than the effective dose of phenasal (niclosamide).

[The efficacy of entomopathogenic bacilli against ancylostomide larvae--Nippostrongylus braziliensis Travassons, 1914]. / Effektivnost' éntomopatogennykh batsill protiv lichinok ankilostomid--Nippostronylus braziliensis Travassons, 1914.

Effects of seven bioinsecticides, containing Bacillus thuringiensis and B. sphaericus toxins, against N. braziliensis larvae were studied in vitro. Bitoxibacillin, astur-3, astur-4, gomelin, lepidocide, dendrobacillin, thuringin and sphaerix were found highly effective larvicides. Protein endotoxin was the principal component responsible for the larvicidal effect, the spores were of no importance.

[The search for new antiparasitic agents. 11. The acute toxicity and anticestodal activity of the new anthelmintic Tizanox compared with Azinox]. / Poisk novykh protivoparazitarnykh sredstv. 11. Ostraia toksichnost' i protivotsestodnaia aktivnost' novogo antigel'mintika tizanoksa v sravnenii s azinoksom.

A synthesis is described and the results of toxicological trial of the potential anthelmintic agent G-1587 are presented. The agent is 2-(cyclohexylcarbonyl)-1,2,3,6,7,11b-hexahydro-2H-[1, 2,5] thiadiazino [3,2-a] isoquinoline-4,4-dioxide. The agent was shown to have a low toxicity, the maximal sublethal dose for mice being 4.0 g/kg when given per os.

[The search for new antiparasitic agents. 9. The anthelmintic activity of halogen-containing sulfonamidobenzamides]. / Izyskanie novykh protivoparazitarnykh sredstv. 9. Protivogel'mintnaia aktivnost' galoidsoderzhashchikh sul'fonamidobenzamidov.

The results of preclinical trials of 28 new compounds of haloid-containing sulfamidobenzamides with low toxicity are presented. The trials on a hymenolepiasis model showed that effectiveness of N-(2,5-dichlorophenyl)-2/(3-nitro-4-chlorophenyl) sulfonylamino/-5-bromobenzamide was similar to that of the well-known drug niclosamide. In the trials on an opisthorchiasis model, 2 compounds were shown to be highly effective, and on a trichocephaliasis model 5 compounds showed a high activity.

[The search for new antiparasitic agents. 8. The synthesis and study of the acute toxicity, anti-alveolar hydatid and antihymenolepiasis activity of 1-alkyl-4[4-(heterylamino)phenyl]piperazines]. / Izyskanie novykh protivoparazitarnykh sredstv. 8. Sintez i issledovanie ostroi toksichnosti, protivoal'veokokkoznoi i protivogimenolepidoznoi aktivnosti nekotorykh 1-alkil-4[4-(geterilamino)fenil]piperazinov.

The synthesis and the acute toxicity and anticestodal activity of l-alkyl-4-[-(heterylamino)phenyl]-piperazines are presented. These compounds were found to be able to suppress the growth of larvocysts of Echinococcus multilocularis in cotton rats when injected intraperitoneally in a single dose of 0.25 g/kg, close to capacity of mebendazole. The tested compounds were also highly effective against the adult stage of Hymenolepis nana. Experimentally infected mice given an oral single dose of 0.2-0.5 g/kg of the drug were radically cured.

[The search for new antiparasitic agents. 7. A study of the relationship between the structure and the anthelmintic activity of new halogen-containing benzamides]. / Izyskanie novykh protivoparazitarnykh sredstv. 8. Izuchenie sviazi mezhdu stroeniem i protivogel'mintnoi aktivnost'iu novykh galoidsoderzhashchikh benzamidov.

Anthelminthic properties of new series of haloid-containing benzamides have been studied. The anthelminthic activity-structure relationships of the compounds under study has been examined. A number of highly active compounds promising for further investigations have been identified.