Two Deasy penalties in the third quarter edged Munster in front before James Arlidge restored his side's advantage but Deasy booted Munster ahead and in the closing minutes the visitors had to withstand phase after phase of Nottingham pressure before emerging worthy winners.
Munster: Denis Hurley; Danny Barnes, Tom Gleeson, Ivan Dineen, Barry Murphy; Scott Deasy, Conor Murray; Dave Kilcoyne, Sean Henry, Stephen Archer; Ian Nagle, Dave Foley; Billy Holland (c), Tommy O'Donnell, Paddy Butler. Replacements: Duncan Casey, Peter Borlase, Dave O'Callaghan, Kieran Essex, Duncan Williams, Declan Cusack, Simon Zebo.
Nottingham: D Jackson; A Savage, A Forsyth, J Sifa, T Streather; T Usasz, J Arlidge; J Harris, J Stephens, M Halsall; I Kench, A Williams; C Hammond, L Sherriff, S Kalamafoni. Replacements: B Buxton, T Youngs, A Shaw, P Eggleshaw, F Barnham, Hamilton, D Marshall.