| abstract |
(57) [Summary] (Correction) [Constitution] This compound has a 6-spiroketal ring system of 2 Due to the elimination of the 5-position carbon atom and the 25-alkyl substituent, The following formula whose size is reduced to the 6,5-spiroketal ring system [Wherein R is hydrogen, alkyl, alkenyl or phenyl, R 1 is hydrogen, alkyl, alkenyl, etc., R 2 is hydroxy, alkoxy, alkanoyloxy, etc., R 3 Represents hydrogen, hydroxy, alkyloxy, etc.]. [Effect] This compound is an antiparasitic agent in humans and animals, It is useful as an insecticide and anthelmintic. |