4-???????????

4-??????????? ??? ???

???(??):: Ethinylestradiol EP Imp K;4-Methyl-ethinylestradiol;Ethinylestradiol Impurity;4-Methyl Ethynyl Estradiol;4-METHYL-17-ETHYNYL ESTRADIOL;Ethinylestradiol EP Impurity K;Ethinylestradiol EP Impurity K/4-Methyl Ethynyl Estradiol;Ethinylestradiol EP Impurity K (4-Methyl Ethynyl Estradiol);(17α)-4-Methyl-19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol;Ethinylestradiol Impurity 11（Ethinylestradiol EP Impurity K）

?? ?? 45

4-??????????? ??

Ethynyl Estradiol (E685100) impurity K.

???( 45)?? ??

???	??	???	??	?? ?	??
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28172	58
Standardpharm Co. Ltd.	86-714-3992388	overseasales1@yongstandards.com	United States	14332	58
CR Corporation Limited	+8613062833949	fred.wen@crcorporation.cn	China	8647	58
China National Standard Pharmaceutical Corporation Limited	+8615391658522	overseasales@yongstandards.com	China	11922	58
Guangzhou CATO Research Chemicals Inc.	+86-020-81960175-617 +8615602392859	Intermediate@cato-chem.com	China	6335	58
Moxin Chemicals	+8617320513646	mike@molcoo.com	China	9658	58
QUALITY CONTROL SOLUTIONS LTD.	0755-66853366; 13670046396	ORDERS@QCSRM.COM	China	24342	58
J & K SCIENTIFIC LTD.	010-82848833 400-666-7788	jkinfo@jkchemical.com	China	96815	76
Chemsky (shanghai) International Co.,Ltd	021-50135380	shchemsky@sina.com	China	15402	60
Cato Research Chemicals Inc.	020-81960175	min.he@cato-chem.com	China	1955	55

Estradiol 9,11-Dehydro Ethynyl Estradiol EthynylEstradiol Sulfate Estrone (8S,9S,13S,14S,17R)-17-ethynyl-4,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-1,17-diol 1,3,5(10)-ESTRATRIEN-17-ALPHA-ETHYNYL-3,17-BETA-DIOL-6-ONE 1,3,5(10), 6-ESTRATETRAEN-17-ALPHA-ETHYNYL-3,17-BETA-DIOL (8S,9S,13S,14S,17S)-17-ethynyl-1,13-dimethyl-7,8,9,11,12,14,15,16-octa hydro-6H-cyclopenta[a]phenanthrene-3,17-diol Ethinylestradiol 16-Oxo Ethynyl Estradiol 1,3,5(10)-ESTRATRIEN-17-ALPHA-ETHYNYL-3,6-ALPHA, 17-BETA-TRIOL 6-α-Hydroxy Ethinylestradiol 2-Methyl Ethynyl Estradiol 18-Methylethynyl Estradiol β-Estradiol 19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol