上游原料
Dihydro-2,5-furandione; Succinic anhydride3-(aminosulfonyl)-5-nitro-4-phenoxybenzoic acidmethyl 3-(aminosulfonyl)-5-nitro-4-phenoxybenzoatemethyl 3-amino-5-(aminosulfonyl)-4-phenoxybenzoatesuccinoyl dichloridemethyl 3-(aminosulfonyl)-5-(2,5-dioxo-1-pyrrolidinyl)-4-phenoxybenzoatemethyl 3-(aminosulfonyl)-4-phenoxy-5-(1-pyrrolidinyl)benzoate
