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NEW METHODS FOR BETA-LACTAM FORMATION FROM BETA-AMINO ACIDS WITH ORGANOPHOSPHOROUS COMPOUNDS KIM, CW; CHUNG, BY; NAMKUNG, JY; LEE, JM; Kim, Sung Gak, TETRAHEDRON LETTERS, v.31, no.20, pp.2905 - 2906, 1990-01 |
PREPARATION OF BETA-LACTAMS FROM BETA-AMINO ACIDS WITH DI-2-PYRIDYL SULFITE Kim, Sung Gak; YI, KY; NAMKUNG, JY, HETEROCYCLES, v.29, no.7, pp.1237 - 1240, 1989-07 |
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