A new coumarin glucoside,daphkoreanin, has been isolated from the roots and stems of Daphne koreana. Its structure was established as 5-methoxy-7-hydroxy coumarin-8-O-beta-D-glucoside by physicochemical properties and...A new coumarin glucoside,daphkoreanin, has been isolated from the roots and stems of Daphne koreana. Its structure was established as 5-methoxy-7-hydroxy coumarin-8-O-beta-D-glucoside by physicochemical properties and (1)HNMR spectral analysis.展开更多
Twelve new nitrogen-oxygen donor macrocycles have been synthesized by condensation or N,N-bis[2-(2-formylphenoxy)ethyl]-4-methylphenylsulfonamide with diamines followed by a one pot reduction of the corresponding Schi...Twelve new nitrogen-oxygen donor macrocycles have been synthesized by condensation or N,N-bis[2-(2-formylphenoxy)ethyl]-4-methylphenylsulfonamide with diamines followed by a one pot reduction of the corresponding Schiff-base derivatives, The 4-methylphenylsulfonyl group can be removed by Na-Hg(6%) in methanol. All of the new aza-crowns were identified by EA, NMR, IR and MS.展开更多
Six kinds of new ditopic receptor macrocycles were synthesized by the condensation of 1,10-bis(4-formylphenyl)-1,4,7,10-tetraoxadecane or 1,10-bis(4-formyl-2-methoxyphenyl)-1,4,7,10-tetraoxadecane with polyamines. The...Six kinds of new ditopic receptor macrocycles were synthesized by the condensation of 1,10-bis(4-formylphenyl)-1,4,7,10-tetraoxadecane or 1,10-bis(4-formyl-2-methoxyphenyl)-1,4,7,10-tetraoxadecane with polyamines. The macrocycles were characterized by elemental analysis, IR, H-1 MMR.展开更多
IN July of 1994, a 13-year old girl from Shandong Province, China, found a dark point on her middle finger of the right hand. She licked it with a needle, and washed clothes with pool water by hands afterwards. Intole...IN July of 1994, a 13-year old girl from Shandong Province, China, found a dark point on her middle finger of the right hand. She licked it with a needle, and washed clothes with pool water by hands afterwards. Intolerable pain was experienced about 10h later. The gangrene was developed in a week and spread gradually up to the right forearm and two fingers of the left hand. In November of 1994, she visited Beijing Army General Hospital, and radical amputations of the right forearm and two fingers of the left hand were carried out after 3d of展开更多
文摘A new coumarin glucoside,daphkoreanin, has been isolated from the roots and stems of Daphne koreana. Its structure was established as 5-methoxy-7-hydroxy coumarin-8-O-beta-D-glucoside by physicochemical properties and (1)HNMR spectral analysis.
文摘Twelve new nitrogen-oxygen donor macrocycles have been synthesized by condensation or N,N-bis[2-(2-formylphenoxy)ethyl]-4-methylphenylsulfonamide with diamines followed by a one pot reduction of the corresponding Schiff-base derivatives, The 4-methylphenylsulfonyl group can be removed by Na-Hg(6%) in methanol. All of the new aza-crowns were identified by EA, NMR, IR and MS.
文摘Six kinds of new ditopic receptor macrocycles were synthesized by the condensation of 1,10-bis(4-formylphenyl)-1,4,7,10-tetraoxadecane or 1,10-bis(4-formyl-2-methoxyphenyl)-1,4,7,10-tetraoxadecane with polyamines. The macrocycles were characterized by elemental analysis, IR, H-1 MMR.
文摘IN July of 1994, a 13-year old girl from Shandong Province, China, found a dark point on her middle finger of the right hand. She licked it with a needle, and washed clothes with pool water by hands afterwards. Intolerable pain was experienced about 10h later. The gangrene was developed in a week and spread gradually up to the right forearm and two fingers of the left hand. In November of 1994, she visited Beijing Army General Hospital, and radical amputations of the right forearm and two fingers of the left hand were carried out after 3d of
