| abstract |
N-Substituted dihydropyrrole derivatives represented by general formula (I) or salts thereof wherein R1 is hydrogen, alkyl, or the like; R?2 and R3¿ are each independently alkyl or the like, or alternatively R?2 and R3¿ together with the carbon atom to which they are bonded may form a five- to seven-membered ring or the like; R4 is hydrogen, alkylcarbonyl, or the like; A is alkyl or the like; n is an integer of 1 to 5; and X is oxygen, sulfur, sulfinyl or sulfonyl. |