X-RAY CONTRAST MEDIUM Ⅲ.SYNTHESIS OF α-ETHYL-2, 4, 6-TRIHALO-3-AMINO-CINNAMTC ACID AND THEIR DERIVATIVES
CHAO MIEN(MIEN CHAO), HU PING-CHENG
Acta Chimica Sinica . 1957, (5): 361 -366 .