CHINESE CHEMICAL LETTERS 

Vol. 10, No. 12, 1999

CONTENTS

Alkylation of phenol with methanol over basic X zeolites……………………..

…………………………………………………………...……J. XU, A. Z. YAN, Q. H. XU

983

Reductive cleavage of the Se-Se bond by the Sm-CdCl2-HMP4 system: A new one-pot method for the synthesis of selenoesters…………......………………

………………………………………………………....….X. L. XU, P. LU, Y. M. ZHANG

987

Alkylations of resorcarenes and calix[4]pyrroles in phase transfer catalytic systems…………………………………….……….………….C. G. YAN, J. SUN

989

Novel reaction of nitrosonium(NO⁺) with Hantzsch dihydropyridines……...

………………………………………....………W. CHEN, M. Z. JIN, Z. L. LIU, L. M. WU

991

Synthesis and characterization of new Schiff base and polyoxa-aza cryptands and their rare earth cryptates with [1+1] condensation and reduction methods.…………………………………...….……..Z. MA, R. D. YANG, L. YAN

995

Synthesis of 6,8,9,12-tetrahydroxylated dihydroagarofuransesquiterpenoid from a-santonin……………..……………...…….W. J. XIA, L. D. SUN, Y. Q. TU

999

Synthesis and antitumor activity of 4b-(1,2,3-triazol-1-yl) podophyllotoxins..

…………………………………...…C. N. CAO, Y. Y. CHEN, Y. G. WANG, Y. Z. CHEN

1003

Synthesis of cholesterol derivatives with amino acid as hydrophilic group and the vesicles prepared therefrom…………………..Z. C. LI, W. JIN, F. M. LI

1007

Synthesis of macrocyclic arsinous acid esters…………………………………..

………………………………………………….......X. Y. CHEN, Y. Q. YANG, W. T. TAO

1011

Synthesis and characterization of reactive poly(aryl ether ketone ketone) containing cyclohexene ring…..………….…..Y. N. XUAN, X. G. JIAN, Z. Y. XU

1013

Synthesis and effect of cation binding on photophysical properties of 1,8-anthraceno-18-crown-5………………H. JIANG, H. J. XU, P. J. XIA, Q. F. ZHOU

1015

Synthesis and study of two-photon induced fluorescence of novel dyes……….

……………………………………....…..L. Z. WU, X. TANG, M. H. JIANG, C. H. TUNG

1019

Two new diterpenoid glucosides from Clerodendrum serratum……..………

……………………………….....H. YANG, J. WANG, A. J. HOU, Z. W. LIN, H. D. SUN

1023

A minor new diterpenoid alkaloids from the roots of Delphinium souliei Franch……………………………….....…..L. HE, Y. J. PAN, B. G. LI, Y. Z. CHEN

1027

A novel sesquiterpenoid from Coleus xanthanthus……..………………………

………………....….S. X. MEI, C. M. LI, H. L. ZHENG, Q. T. ZHENG, Y. LU, H. D. SUN

1029

Three new triterpenoid saponins from the seeds of Aesculus chinensis……...

. …………………………………………………...……X. W. YANG, J. ZHAO, Y. X. CUI

1031

A new triterpenoid saponin from Anemone tomentosa……...…………………

……………………………....….X. LIAO, S. L. PENG, B. G. LI, Y. Z. CHEN, L. S. DING

1035

Two new cyclic peptides from Psammosilene tunicoides….…………………..

…………………………....…Z. T. DING, Y. C. WANG, J. ZHOU, N. H. TAN, H. M. WU

1037

UV-visible absorption studies of tetrachloro-p-benzoquinone and tertiary amines charge transfer complexes in trichloromethane……....……………..

……………………………………………………………....………..F. GAO, Y. Y. YANG

1041

Spectroscopic study of the interaction between new fluorescent dyes with nucleic Acids….………………………………….……….X. M. WANG, L. T. CAI

1045

XPS Study of the oxygen on A₂BO₄-type compounds—A new discovery of O_isPeaks…………………………………….......Z. MA, Y. N. QIN, .X. Z. QI, F. HE

1049

Standard enthalpy of formation of monoclinic ammonium paratungstate…...

……………………………………………………....S. J. LIU, Q. Y. CHEN, P. M. ZHANG

1051

Hartree-Fock and density functional theory studies on the molecular recognition of the cyclodextrin……...……..L. LIU, X. S. LI, Q. X. GUO, Y. C. LIU

1053

A Study on adsorption of electrogenerated cystine precipitate onto Au electrode using electrochemical quartz crystal impedance system.…..…….

……………………...……Y. Y. ZHANG, Q. J. XIE, Y. H. GUO, X. J. WANG, S. Z. YAO

1057

Author Index………………………………………………………………...…….

1061

Keyword Index……………………………………………………………………

1072