Chemistry SOFTWARE (1 Viewer)

[unknownuser69]

Hi, does anyone know of any software packages that can draw chemical structures? I need it to be able to draw the two types shown below:

Cheers

 

[xiao1985]

chemdraw and from the same company (cambridge) chem 3D does it

edit: though i should add, the two molecules are not exaclty the same

 

[brenton1987]

Why would you need to draw (2R,4R)-1-[(2S)-5-(diaminomethylideneamino)-2-[[(3R)-3-methyl-1,2,3,4-tetrahydroquinolin-8-yl]sulfonylamino]pentanoyl]-4-methyl-piperidine-2-carboxylic acid?

Unfortunately the ChemDraw software is not cheap.

Theres an opensource software suite available.
http://optusnet.dl.sourceforge.net/sourceforge/cdk/jchempaint-applet-2.2.1.zip
Its browser based which was incredibly annoying and it doesnt do ball and stick.
Its not great but atleast it doesnt cost $1,500.