Example: ul > li will match all <li> elements that are inside a <ul> element. Descendant selectors. The ' ' combinator selects nodes that are children (not necessary direct children) of the former specified element. Example: div span will match any <span> element that is inside a <div> element.
Generic Firazyr. Because a patent is in place until  July 2014, companies are currently not allowed to make a generic version of Firazyr (icatibant). However, after this patent expires, a generic product may become available.
The first patents for Sustiva expired in August 2012 and November 2013. However, generic versions are not yet available. This strongly suggests that other patents or exclusivity rights are still providing significant protection against generic competition. The next patent set to expire will do so in September 2014.