Major ions detected from NMF components that exhibit elevated relative abundance at the primary tumor site and blood- and their tentative structural identification based on accurate mass measurements.

Major ions detected from NMF components that exhibit elevated relative abundance at the primary tumor site and blood- and their tentative structural identification based on accurate mass measurements.从在原发肿瘤部位及血液中呈现相对丰度升高的非负矩阵分解（Non-negative Matrix Factorization, NMF）组分中检测得到的主要离子，及其基于精确质量测定的初步结构鉴定。