Update README.md (#3154)

README.md

@@ -344,6 +344,12 @@ We are currently in Beta stage.  More features and improvements are coming.
 1. [**SLAPS: Self-Supervision Improves Structure Learning for Graph Neural Networks**](https://arxiv.org/pdf/2102.05034.pdf), *Bahare Fatemi, Layla El Asri, Seyed Mehran Kazemi*
 
 1. [**Finding Needles in Heterogeneous Haystacks**](https://homepage.divms.uiowa.edu/~badhikari/assets/doc/papers/CONGCNIAAI2021.pdf), AAAI'21, *Bijaya Adhikari, Liangyue Li, Nikhil Rao, Karthik Subbian*
+  
+1. [**RetCL: A Selection-based Approach for Retrosynthesis via Contrastive Learning**](https://arxiv.org/abs/2105.00795), IJCAI 2021, *Hankook Lee, Sungsoo Ahn, Seung-Woo Seo, You Young Song, Eunho Yang, Sung-Ju Hwang, Jinwoo Shin*
+  
+1. [**Accurate Prediction of Free Solvation Energy of Organic Molecules via Graph Attention Network and Message Passing Neural Network from Pairwise Atomistic Interactions**](https://arxiv.org/abs/2105.02048), *Ramin Ansari, Amirata Ghorbani*
+
+1. [**DIPS-Plus: The Enhanced Database of Interacting Protein Structures for Interface Prediction**](https://arxiv.org/abs/2106.04362), *Alex Morehead, Chen Chen, Ada Sedova, Jianlin Cheng*
 
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