How do I export an xsd from a wsdl? I'm using soapui 5.1.3 (open source)

Update: Turns  out I don't need to generate an xsd after all for my purposes.  All I need is the wsdl for the tool I'm using. 

Therefore the question below is moot, but I was unable to find an option to delete it. 

Another software tool I'm using requires an xsd file as well as a wsdl file. 

I've created a soapui project by importing a wsdl successfully.

Is there a way to export the xsd from soapui? 

I've tried cutting and pasting from the wsdl to create the file by hand, but I get errors that the xsd is malformed and the tool is unable to parse the schema.

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema elementFormDefault="qualified"
...
</xsd:schema>