A renewable raw material. rice straw is pretreated for biorefinery usage. Solution-state two-dimensional (2D) 1H-13 C hetero-nuclear single quantum coherence (HSQC) nuclear magnetic resonance (NMR) spectroscopy. was used to analyze 13 cultivars of rice straw before and after dilute acid pretreatment. https://xrbrands.shop/product-category/collections/