http://www.metro.co.uk/news/article.html?in_article_id=22601&in_page_id=34 A promising young graduate has died after drinking 'liquid ecstasy' which she thought was water. Rute Marques, 22, had a suspected extreme reaction to the drug and GHB after swigging from a bottle. She had just completed a degree in catering management and was due to gradute within days. Miss Marques became ill after drinking what she thought was water which had been left lying around a friend's flat in south London. Although she was not a drug user, it initially appeared that she was suffering from an overdose and she was rushed to nearby St Thomas' Hospital. The Portuguese-born Miss Marques died the following evening without regaining consciousness. GHB, the so-called date rape drug, is often diluted with water for consumption, is also known as 'liquid ecstasy' and is popular in gay clubs and with ravers. Police are investigating how the drug came to be in the water bottle and why the bottle was left at the flat in Hilden House, Parry Street. Officers suspect it had been used for the purposes of clubbing. She died just days before she was due to attend her graduation ceremony and was busy making plans for her family to attend the day. Det Insp Keith Richardson said: 'We are speaking all those who may have been at the flat. 'I would appeal to anyone who has not yet spoken to police, to come forward.' A post mortem on Miss Marques' body took place last Friday at Greenwich Mortuary but police are awaiting the results of further toxicology tests. A coroner's inquest will be carried out in due course. Hugo Marques, the victim's brother, said on the morning of her death she had been making plans for the family to be together at Norwich on Saturday, October 21, for her graduation ceremony from the University of East Anglia. 'She was an independent young woman with thousands of friends and all her life in front of her,' he said. "From the age of 15, she has worked as well as studying hard. Even at university, she worked at weekends and in the evening. 'Once her course was finished, she moved to London to share a flat with friends and after a few temporary jobs, she had just got a job as a hotel manager and was really happy that her plans were going well.' 'I had not seen her for a while because she was always so busy, although we spoke often. 'But we were all going to be together and celebrate her achievements at the university. 'I did not think I would be visiting her bedside instead as she struggled to hang on to the life she had always enjoyed to the full.'