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제 1항에 있어서, 상기 화학식 1의 화합물은 1) (4-히드록시-2,2-디메틸크로만-6-카보닐)구아니딘, 2) (4-메톡시-2,2-디메틸크로만-6-카보닐)구아니딘, 3) (4-벤질옥시-2,2-디메틸크로만-6-카보닐)구아니딘, 4) (2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 5) (8-브로모-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 6) (8-니트로-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 7) (7-클로로-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 8) (2,2,7-트리메틸-2H-크로멘-6-카보닐)구아니딘, 9) (8-디메틸아미노-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 10) (8-메탄설포닐아미노-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 11) (2,2-디메틸크로만-6-카보닐)구아니딘, 12) (8-브로모-2,2-디메틸크로만-6-카보닐)구아니딘, 13) (8-니트로-2,2-디메틸크로만-6-카보닐)구아니딘, 14) (8-아미노-2,2-디메틸크로만-6-카보닐)구아니딘, 15) (4-브로모-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 16) (4,8-디브로모-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 17) (4-브로모-8-니트로-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 18) (4-브로모-7-클로로-2,2-디메틸-2H-크로멘-6-카보닐)구아니딘, 19) (4-브로모-2,2,7-트리메틸-2H-크로멘-6-카보닐)구아니딘, 20) [(3R,4S)-3-히드록시-4-메톡시-2,2-디메틸크로만-6-카보닐]구아니딘, 21) [(3R,4S)-3-히드록시-4-이미다졸-1-일-2,2-디메틸크로만-6-카보닐]구아니딘, 22) [(3R,4S)-3-히드록시-4-피롤-1-일-2,2-디메틸크로만-6-카보닐]구아니딘, 23) (2,2,4-트리메틸-2H-크로멘-6-카보닐)구아니딘, 24) (8-브로모-2,2,4-트리메틸-2H-크로멘-6-카보닐)구아니딘, 25) (7-클로로-2,2,4-트리메틸-2H-크로멘-6-카보닐)구아니딘, 및 26) (2,2,4,7-테트라메틸-2H-크로멘-6-카보닐)구아니딘인 것을 특징으로 하는 (크로멘-6-카보닐)구아니딘 유도체
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