The present invention provides a preparation method for a natural product Trabectedin. Specifically, the present invention provides a preparation method for Et-743. In the method, tyrosine is used as an initial substrate, and after 26 steps of reaction, the Et-743 is synthesized. Raw materials and agents used in the synthetic route can all easily be obtained, reaction conditions are relatively mild, and preparation in large scale can be implemented.

The present invention provides a preparation method for a natural product Trabectedin. Specifically, the present invention provides a preparation method for Et-743. In the method, tyrosine is used as an initial substrate, and after 26 steps of reaction, the Et-743 is synthesized. Raw materials and agents used in the synthetic route can all easily be obtained, reaction conditions are relatively mild, and preparation in large scale can be implemented.

A compound of general formula I, wherein X, R.sub.1-R.sub.4 take various meanings, for use in the treatment of cancer.

##STR00001##

A compound of general formula I, wherein X, R.sub.1-R.sub.4 take various meanings, for use in the treatment of cancer.

##STR00001##

This disclosure provides modulators of Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) having core structure (I), pharmaceutical compositions containing at least one such modulator, methods of treatment of cystic fibrosis using such modulators and pharmaceutical compositions, combination pharmaceutical compositions and combination therapies, and processes and intermediates for making such modulators.

##STR00001##

This disclosure provides modulators of Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) having core structure (I), pharmaceutical compositions containing at least one such modulator, methods of treatment of cystic fibrosis using such modulators and pharmaceutical compositions, combination pharmaceutical compositions and combination therapies, and processes and intermediates for making such modulators.

##STR00001##

The present invention relates to form B of lurbinectedin of the formula:

##STR00001##

The present invention relates to form B of lurbinectedin of the formula:

##STR00001##

Disclosed is a compound which is 17-chloro-5,13,14,22-tetramethyl-28-oxa-2,9-dithia-5,6,12,13,22-pentaazaheptacyclo[27.7.1.1.sup.4,7.0.sup.11,15,0.sup.16,21.0.sup.20,24.0.sup.30,35]octatriaconta-1(37),4(38),6,11,14,16,18,20,23,29,31,33,35-tridecaene-23-carboxylic acid (Formula I) ##STR00001##
and enantiomers and pharmaceutically acceptable salts thereof. Also disclosed are pharmaceutical compositions of 17-chloro-5,13,14,22-tetramethyl-28-oxa-2,9-dithia-5,6,12,13,22-pentaazaheptacyclo[27.7.1.1.sup.4,7.0.sup.11,15.0.sup.16,21.0.sup.20,24.0.sup.30,35]octatriaconta-1(37),4(38),6,11,14,16,18,20,23,29,31,33,35-tridecaene-23-carboxylic acid, and enantiomers and pharmaceutically acceptable salts thereof, and methods of treating cancer with such compounds and compositions.

Disclosed is a compound which is 17-chloro-5,13,14,22-tetramethyl-28-oxa-2,9-dithia-5,6,12,13,22-pentaazaheptacyclo[27.7.1.1.sup.4,7.0.sup.11,15,0.sup.16,21.0.sup.20,24.0.sup.30,35]octatriaconta-1(37),4(38),6,11,14,16,18,20,23,29,31,33,35-tridecaene-23-carboxylic acid (Formula I) ##STR00001##
and enantiomers and pharmaceutically acceptable salts thereof. Also disclosed are pharmaceutical compositions of 17-chloro-5,13,14,22-tetramethyl-28-oxa-2,9-dithia-5,6,12,13,22-pentaazaheptacyclo[27.7.1.1.sup.4,7.0.sup.11,15.0.sup.16,21.0.sup.20,24.0.sup.30,35]octatriaconta-1(37),4(38),6,11,14,16,18,20,23,29,31,33,35-tridecaene-23-carboxylic acid, and enantiomers and pharmaceutically acceptable salts thereof, and methods of treating cancer with such compounds and compositions.