손연수 이상범 송수창 2024-01-13T00:03:34Z 2024-01-13T00:03:34Z 2002-01-07 https://pubs.kist.re.kr/handle/201004/100008 온도감응성을　갖는　고리형　포스파젠　삼량체　및　그의　제조방법 Patent 2002-01-07 1999-11-05 321296 99-48800 KO 특허 한국과학기술연구원