去美国专利局试试
【 在 factory (factory) 的大作中提到: 】
: JP02078692 为什么在欧洲专利局上搜不到
: Nasu, Rikuo; Kimura, Shinichi; Asai, Nobuyoshi. Preparation of S,O-dialkyl (2-oxo-3-thiazolidinyl)phosphonothiolates as insecticides, acaricides, nematocides, and soil pesticides. Jpn. Kokai Tokkyo Koho (1990), 3 pp. CODEN: JKXXAF JP02078
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FROM 60.28.138.*